| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 204453000 | With injection | 44 |
| 20080210560 | Stationary capillary electrophoresis system - A system and method for capillary electrophoresis are provided for analyzing a macromolecule prepared from a complex liquid mixture. In particular applications, methods and apparatus are provided for separating and analyzing a solution containing a denatured macromolecule by employing a stationary capillary electrophoresis apparatus. An apparatus for capillary electrophoresis includes an inlet chamber and a capillary electrophoresis column. One end of the column is fixed at the interior of the inlet chamber. The column has a length of at least about 20 centimeters. Also included is a liquid source adapted for automatic control. The liquid source supplies a liquid sample through an input valve into the inlet chamber so that the sample is in fluid communication with the end of the column. A method for capillary electrophoresis includes automatically supplying the liquid sample to the apparatus. | 09-04-2008 |
| 20080223722 | Electrophoresis process - An electrophoresis apparatus is generally disclosed for sequentially analyzing a single sample or multiple samples having one or more analytes in high or low concentrations. The apparatus comprises a relatively large-bore transport capillary which intersects with a plurality of small-bore separation capillaries and includes a valve system. Analyte concentrators, having antibody-specific (or related affinity) chemistries, are stationed at the respective intersections of the transport capillary and separation capillaries to bind one or more analytes of interest. The apparatus allows the performance of two or more dimensions for the optimal separation of analytes. The apparatus may also include a plurality of valves surrounding each of the analyte concentrators to localize each of the concentrators to improve the binding of one or more analytes of interest. | 09-18-2008 |
| 20080257735 | Microfluidic Device for Enabling the Controlled Growth of Cells and Methods Relating to Same - A multi-compartment microfluidic device for enabling fluidic isolation among interconnected compartments and accomplishing centrifugal positioning and/or patterned substrate positioning of biological specimens. Includes micropatterned substrate coupled with optically transparent housing allowing imaging. Housing includes microfluidic region having entry reservoir for accepting first volume of fluid and additional microfluidic region(s) having a second entry reservoir for accepting second volume of fluid less than first volume of fluid to create hydrostatic pressure. A barrier region that couples the microfluidic region with the second microfluidic region enables biological specimen(s) to extend across the microfluidic, barrier region and second microfluidic region. The barrier region includes embedded microgroove(s) having width and height enabling second volume of fluid to be fluidically isolated from first volume of fluid via hydrostatic pressure maintained via the embedded microgroove(s). Cells are aligned to a chosen location using a centrifuge or patterned substrate techniques. | 10-23-2008 |
| 20080257736 | Method for Electrophoresis Using Media of Differing Properties - The invention relates to a method for electrophoresis in a separation chamber, the method involving introduction of one or more counterflow media of at least two differing properties through multiple counterflow medium inlets into the separation chamber, to provide improved collection of fractionated samples. | 10-23-2008 |
| 20090008253 | Device and Process for Continuous On-Chip Flow Injection Analysis - A micro-fluidic method for continuous pressure-driven flow injection analysis and a planar microfluidic device intended for pressure driven flow injection analysis are provided. A network of microchannels allows a continuous flow of sample stream on the devices, as well as facile and reproducible analyte plug injection to a reagent or buffer stream on microchip-based devices. The method allows for sequent separation analysis without additional purging cycles. | 01-08-2009 |
| 20090071828 | Devices Exhibiting Differential Resistance to Flow and Methods of Their Use - The invention features microfluidic devices that contain structures that impart differential resistance to a fluid flow. The structures are disposed adjacent to intersections of channels. Devices of the invention provide differential resistance, e.g., under electric-field-driven flow and pressure-driven flow. | 03-19-2009 |
| 20090166201 | INJECTION METHOD FOR MICROFLUIDIC CHIPS - A microfluidic chip comprising a separation channel configured to receive a sieving matrix and a buffer and an injection channel in fluid communication with the separation channel. The injection channel is configured to receive a sample using a capillary force and a portion of the sample injects into the separation channel electro-kinetic force exerted on the sample. | 07-02-2009 |
| 20090166202 | INJECTION METHOD FOR MICROFLUIDIC CHIPS - A microchip for electrophoresis is provided. The microchip comprises an injection channel and a separation channel configured to receive a sample through a sample well. The injection channel and the separation channel form a ‘T’ junction. The microchip comprises a first electrode disposed at a first end of the separation channel, a second electrode disposed in front of the ‘T’ junction and adjacent to the first electrode, a third electrode disposed at a first end of the injection channel and a fourth electrode disposed at a second end of the separation channel. A portion of the sample is injected and separated into an area between the ‘T’ junction and the fourth electrode. | 07-02-2009 |
| 20090166203 | INJECTION METHOD FOR MICROFLUIDIC CHIPS - A microchip for capillary electrophoresis is provided. The microchip comprises an injection channel and a separation channel configured to receive a sample through a sample well disposed on a first end of the separation channel; wherein the injection channel and the separation channel intersect to form a ‘T’ junction. The microchip further comprises a first valve disposed adjacent to the ‘T’ junction and on the separation channel and a second valve disposed at the ‘T’ junction. The second valve is a two-way valve. A sample plug is injected into an area between the ‘T’ junction and a second end of the separation channel. | 07-02-2009 |
| 20090200167 | Protein Analysis Using A Polymethine Marker Dye - A kit for optically detecting proteins, in particular lipoproteins, in a sample, the kit comprising: a chip for performing a separation of the proteins, in particular of the lipoproteins, wherein the chip comprises at least one well for receiving the sample, and a separation channel coupled to the at least one well and being adapted for separating different compounds and a marker dye which contains a polymethine of the general formula (I) wherein Z is a substituted derivative of benzooxazole, benzodiazole, 2,3,3-trimethylindolinine, 2,3,3-trimethyl-4,5-benzo-3H-indolinine, 3- and 4-picoline, lipidine, chinadine and 9-methylacridine derivatives with the general formula IIa or IIb or IIc and wherein X is selected from the group consisting of O, S, Si, N-alkyl and C(alkyl) | 08-13-2009 |
| 20090223822 | METHOD FOR PRETREATMENT OF ELECTROPHORESIS, SUBSTRATE FOR ANALYSIS, AND PRETREATMENT APPARATUS FOR ELECTROPHORESIS | 09-10-2009 |
| 20100096267 | SYSTEM AND METHOD FOR PERFORMING MICROFLUIDIC MANIPULATION - Electrophoresis systems and methods comprise an electrophoresis device, wherein the electrophoresis comprises a loading channel, a separation channel, and an injection channel. The loading channel is in fluid communication with a first and second sample port. The separation channel is connected to the loading channel to form a first intersection, and an injection channel connected to the separation channel to form a second intersection and in fluid communication with a first reservoir, and wherein the separation channel is in fluid communication with a second reservoir. The electrophoresis system further comprises two electrodes coupled to the first sample port and the first reservoir, and the first sample port and the second reservoir, respectively, that are adapted to move the sample into the loading channel towards the first reservoir and form a sample plug in the separation channel, and to further move the sample plug into the separation channel towards the second reservoir. | 04-22-2010 |
| 20100116661 | ELECTROPHORETIC CHIP AND A METHOD OF ELECTROPHORESIS - A channel ( | 05-13-2010 |
| 20100155244 | INJECTION METHOD FOR MICROFLUIDIC CHIPS - Methods and systems for injecting a sample during electrophoresis, that generally comprise: loading a sieving matrix through a first end of a separation channel; having the an end of the sieving matrix at a set distance from the intersection of the separation channel and a loading channel; pressure loading a sample through the loading channel and filling an empty portion of the separation channel; applying an electric field across the separation channel while flowing a washing buffer through the loading channel; and injecting a portion of the sample into the separation channel, wherein the portion of the sample injected is of a size that is determined by a distance between the end of the sieving matrix and the intersection of the loading and separation channels. | 06-24-2010 |
| 20100163412 | ON-DEMAND MICROFLUIDIC DROPLET OR BUBBLE GENERATION - Microfluidic systems and methods can dispense single or multiple fluid particles (such as a gas or other fluid bubble) or an encapsulated particle (e.g., a bead or biological cell) into a microchannel. | 07-01-2010 |
| 20100170796 | In Vitro Microfluidic Model of Microcirculatory Diseases, and Methods of Use Thereof - One aspect of the invention relates to a microfluidic device which recreates important features of the human microcirculation on a microscope stage. In certain embodiments of the invention, the clinical scenario associated with ‘sickle cell crisis’ whereby blood vessels are occluded in various organs causing pain and tissue damage can be recreated. In certain embodiments, one can use a device of the invention to study the processes that lead to crisis, and screen therapies (such as small molecules) that might be used to prevent crisis. Further, certain embodiments of the invention allow one to study and screen therapies for a range of human blood disorders, such as hereditary spherocytosis, disorders of white blood cells, such as Waldenstrom's macroglobulinemia or leukocytosis, disorders of blood platelets and coagulation, such as hemophilia A and B, activated protein C resistance, and essential thrombocythemia. | 07-08-2010 |
| 20100187113 | CAPILLARY SIEVING ELECTROPHORESIS WITH A CATIONIC SURFACTANT FOR SIZE SEPARATION OF PROTEINS - Disclosed herein is a method for size separation of proteins by capillary sieving electrophoresis with cationic surfactant, suitable for molecular-weight determination of proteins in the range between about 14,000 and 500,000, further a composition of a separation medium and of a denaturing solution for said method. In a preferred embodiment, the separation medium comprises a buffer having pH between about 3 and 5.5, a neutral hydrophilic sieving polymer, and between about 0.5 and 30 g/L cationic surfactant. | 07-29-2010 |
| 20100193357 | QUANTITATIVE ANALYSIS METHOD FOR MICRORNAS - The present invention discloses a quantitative analysis method for microRNAs, wherein a fluorescence-labeled DNA probe, which is equinumerous and completely complementary to a microRNA, hybridize with the microRNA. The products of hybridization include the fluorescence-labeled DNA probe containing 22 nucleotides and the probe-microRNA duplex containing 22 base pairs. The products of hybridization is introduced into a capillary by the pressure difference between two ends of the capillary and the siphon effect and separated by electrophoresis. A laser is used to induce fluorescence from the products of hybridization. Then, the intensities of fluorescence are measured and analyzed. | 08-05-2010 |
| 20100300879 | DUAL ELECTRODE INJECTION OF ANALYTE INTO A CAPILLARY ELECTROPHORETIC DEVICE - An injection system including a first electrical circuit for concentration of an analyte and a second electrical circuit for injection of the concentrated analyte into an electrophoretic device is described, as well as methods of using the injection system. | 12-02-2010 |
| 20110005932 | UNIVERSAL SAMPLE PREPARATION SYSTEM AND USE IN AN INTEGRATED ANALYSIS SYSTEM - The invention provides a system that can process a raw biological sample, perform a biochemical reaction and provide an analysis readout. For example, the system can extract DNA from a swab, amplify STR loci from the DNA, and analyze the amplified loci and STR markers in the sample. The system integrates these functions by using microfluidic components to connect what can be macrofluidic functions. In one embodiment the system includes a sample purification module, a reaction module, a post-reaction clean-up module, a capillary electrophoresis module and a computer. In certain embodiments, the system includes a disposable cartridge for performing analyte capture. The cartridge can comprise a fluidic manifold having macrofluidic chambers mated with microfluidic chips that route the liquids between chambers. The system fits within an enclosure of no more than 10 ft | 01-13-2011 |
| 20110155575 | CAPILLARY ELECTROPHORESIS SYSTEMS AND METHODS - An embodiment of the invention is directed to a capillary electrophoresis apparatus comprising a plurality of separation micro-channels. A sample loading channel communicates with each of the plurality of separation channels. A driver circuit comprising a plurality of electrodes is configured to induce an electric field across each of the plurality of separation channels sufficient to cause analytes in the samples to migrate along each of the channels. The system further comprises a plurality of detectors configured to detect the analytes. | 06-30-2011 |
| 20120006681 | Controlled Dispensing of Ultrafine, Variable Volume, Emulsion Droplets - Embodiments of the present invention comprise a surface microfluidic system with varying coplanar electrode structure capable of precision dispensing of an array of variable volume droplets in a rapid, controlled and automated fashion. Furthermore, the invention provides surface microfluidic methods and systems for the creation and transport of emulsion droplets, including vesicles and cells. | 01-12-2012 |
| 20120037508 | Electrophoresis Apparatus and Control Method Thereof - An electrophoresis apparatus that applies voltage from electrodes that are provided in a capillary flow channel and causes component separation by performing electrophoresis on a specimen that is injected into the capillary flow channel comprises: a physical quantity acquisition unit and a physical quantity determination unit. The physical quantity acquisition unit, with migration solution and specimen injected inside the capillary flow channel, acquires an electrical quantity that occurs in the capillary flow channel at a specified time when voltage is being applied to the electrodes. The physical quantity determination unit determines whether or not the electrical quantity that the physical acquisition unit acquires is within a specified range. | 02-16-2012 |
| 20120090997 | MICROELECTRODE ARRAY - Microelectrode comprising a body formed from electrically non-conducting material and including at least one region of electrically conducting material and at least one passage extending through the body of non-conducting material and the region of conducting material, the electrically conducting region presenting an area of electrically conducting material to a fluid flowing through the passage in use. An electrochemical cell which includes such a microelectrode is also disclosed. | 04-19-2012 |
| 20120111727 | CAPILLARY SIEVING ELECTROPHORESIS WITH A CATIONIC SURFACTANT FOR SIZE SEPARATION OF PROTEINS - Disclosed herein is a method for size separation of proteins by capillary sieving electrophoresis with cationic surfactant, suitable for size separation of proteins with molecular weights in the range between about 14,000 and about 500,000, further a composition of a separation medium and denaturing solution for said method of separation method. In a preferred embodiment, the separation medium comprises a buffer having pH between about 3 and 5.5, a neutral hydrophilic sieving polymer, and between about 0.5 and about 30 g/L cationic surfactant. | 05-10-2012 |
| 20120175255 | AFFINITY CAPILLARY ELECTROPHORESIS METHOD FOR ASSESSING A BIOLOGICAL INTERACTION OF A LIGAND/RECEPTOR PAIR SUCH AS G PROTEIN COUPLED RECEPTOR AND ITS TARGETS AS WELL AS FOR DRUG SCREENING - The invention relates to capillary electrophoresis-based methods for screening compound libraries for affinity lig- ands, in particular weak-binding ligands. | 07-12-2012 |
| 20120255861 | GROWTH TUBE MICROCHIP ELECTROPHORESIS SYSTEM - This technology is a method and apparatus for the semi-continuous measurement of the concentration of constituents of airborne particles which couples a laminar flow, water condensation particle collector to a microfluidic device for assay of particle chemical composition by electrophoresis. The technology has been used for the assay of sulfates, nitrates, chlorides, and organic acids contained in fine and submicrometer atmospheric particles. For these compounds the apparatus and method described is capable of one-minute time resolution at concentrations at the level of micrograms of analyte species per cubic meter of air. Extension to other analytes is possible. | 10-11-2012 |
| 20130001084 | SEPARATION MEDIUM FOR CAPILLARY ELECTROPHORESIS SUPPRESSING ELECTROOSMOTIC FLOW IN BARE CAPILLARIES AND CHANNELS - Disclosed herein is a composition of a separation medium and method of its use for electrophoresis in bare channels, either capillaries or chips, with suppressed electroosmotic flow, wherein various forms of boric acid are adsorbed on the wall of said separation channel, efficiently suppressing zeta potential of the wall of said bare channel. A composition of a sieving separation medium for electrophoresis of DNA is disclosed. A composition of a sieving separation medium for electrophoretic size separation of proteins by SDS CSE is also disclosed. A composition of a separation medium for capillary electrophoresis without sieving is also disclosed. | 01-03-2013 |
| 20130140181 | Apparatus and Methods for Conducting Assays and High Throughput Screening - The present invention provides microfluidic devices and methods for using the same. In particular, microfluidic devices of the present invention are useful in conducting a variety of assays and high throughput screening. Microfluidic devices of the present invention include elastomeric components and comprise a main flow channel; a plurality of branch flow channels; a plurality of control channels; and a plurality of valves. Preferably, each of the valves comprises one of the control channels and an elastomeric segment that is deflectable into or retractable from the main or branch flow channel upon which the valve operates in response to an actuation force applied to the control channel. | 06-06-2013 |
| 20130175170 | ELECTROPHORESIS SYSTEMS, DEVICES, AND ASSOCIATED METHODS OF ANALYSIS - Embodiments of electrophoresis systems, devices, and associated methods of analysis are described herein. In one embodiment, an electrophoresis device includes a first electrode having a first polarity, a second electrode having a second polarity, and a substrate. The substrate includes a first channel having a first section with a first cross-sectional area and a second section with a second cross-sectional area. The first end is electrically coupled to the first electrode, and the second end is electrically coupled to the second electrode. The first cross-sectional area is greater than the second cross-sectional area in a first dimension and in a second dimension generally orthogonal to the first dimension. | 07-11-2013 |
| 20130175171 | NANO AND MICROFLUIDIC DEVICE FOR SEPARATING AND CONCENTRATING PARTICLES PRESENT IN A FLUID - A device for separating and concentrating particles present in a fluid, including: a first microchannel, having at least one first aperture; and at least one second microchannel, having at least one second aperture, and an end is disclosed. The first microchannel surrounds part or all of the second microchannel at the end. The first microchannel and the second microchannel are connected, at the end, by at least one nanochannel, the nanochannel(s) forming a restriction between the first microchannel and the second microchannel. A cap bounds the first microchannel, the second microchannel and the nanochannel at the end. The first microchannel and the second microchannel are made in a first substrate. The first aperture and the second aperture open into a same face of this substrate. The device may be used for separating and concentrating particles of biological samples, such as viruses, DNA or synthesic molecules. | 07-11-2013 |
| 20130341190 | Method and Apparatus for Analysis and Sorting of Polynucleotides Based on Size - The invention relates to a microfabricated device and methods of using the device for analyzing and sorting polynucleotide molecules by size. | 12-26-2013 |
| 20140021050 | REDUCED ARTIFACT DENATURING CAPILLARY ELECTROPHORESIS OF NUCLEIC ACIDS - Described are methods of reducing the incidence and/or magnitude of artifacts in denaturing nucleic acid capillary electrophoresis (CE). Methods and systems described serve to dismiss non-denatured DNA from the tip of the capillary after sample injection and prior to electrophoretic separation of loaded nucleic acids. Among the methods disclosed are the application of a brief reverse-polarity pulse to the capillary prior to separation but after removal of the capillary from the sample reservoir, and transiently heating the capillary to cause expansion of the separation matrix after removal of the capillary from the sample reservoir. | 01-23-2014 |
| 20140151229 | MANIPULATION OF OBJECTS IN MICROFLUIDIC DEVICES USING EXTERNAL ELECTRODES - The invention provides microfluidic devices, systems, and methods for manipulating an object within a channel of a microfluidic device using an external electrode. The device has a channel disposed within the device, the channel having no included electrodes. The channel has a wall, at least a portion of which is penetrable by an electric field generated external to the device, the wall being penetrable such that the electric field extends through the wall portion and into a region within the channel. The system includes the microfluidic device and an electrode external to and not bonded to the device. In the method, the external electrode is placed adjacent to the device and energized to generate an electric field that extends through the wall of the device and into the channel, thereby manipulating an object within the channel. | 06-05-2014 |
| 20150047979 | Capillary Electrophoresis For Subterranean Applications - A method of fluid testing includes pressurizing a fluid testing system, disposed at a subterranean location under high pressure compared to a surface pressure, to achieve a desired pressure differential between the high pressure and an internal pressure of the fluid testing system. The fluid testing system includes a capillary electrophoresis system and one or more test fluid reservoirs. The method also includes directing test fluid from the one or more test fluid reservoirs into capillaries to condition the capillaries. The method further includes directing sample fluid into the capillaries for testing while at the subterranean location. | 02-19-2015 |
| 20150060276 | Nanopore Control With Pressure and Voltage - There is provided a nanopore system including a nanopore in a solid state membrane. A first reservoir is in fluidic connection with the nanopore, the first reservoir being configured to provide, to the nanopore, nucleic acid molecules in an electrolytic solution. A second reservoir is in fluidic connection with the nanopore, with the nanopore membrane separating the first and second reservoirs. A pressure source is connected to the first reservoir to apply an external pressure to the first reservoir to cause nanopore translocation of nucleic acid molecules in the solution in the first reservoir. A voltage source is connected between the second and first reservoirs, across the nanopore, with a voltage bias polarity that applies an electric field counter to the externally applied pressure. Force of the externally applied pressure is greater than force of the electric field during nanopore translocation by the nucleic acid molecules. | 03-05-2015 |
| 20150060277 | Nanopore Control With Pressure and Voltage - There is provided a nanopore system including a nanopore in a support structure. A first reservoir is in fluidic connection with the nanopore and a second reservoir is in fluidic connection with the nanopore. The support structure separates the first and second reservoirs. A pressure source is connected to one of the first and second reservoirs to apply an external pressure to one of the first and second reservoirs. A voltage source is connected between the first and second reservoirs to apply a voltage bias between the first and second reservoirs, across the nanopore. This system enables a method for analysis of species in solution, wherein there is provided to the nanopore a fluidic solution that includes a species for translocation through the nanopore, with an external pressure applied to the species in fluidic solution and a voltage bias applied across the nanopore. | 03-05-2015 |
| 20150136604 | SAMPLE PREPARATION, PROCESSING AND ANALYSIS SYSTEMS - This disclosure provides an integrated and automated sample-to-answer system that, starting from a sample comprising biological material, generates a genetic profile in less than two hours. In certain embodiments, the biological material is DNA and the genetic profile involves determining alleles at one or a plurality of loci (e.g., genetic loci) of a subject, for example, an STR (short tandem repeat) profile, for example as used in the CODIS system. The system can perform several operations, including (a) extraction and isolation of nucleic acid; (b) amplification of nucleotide sequences at selected loci (e.g., genetic loci); and (c) detection and analysis of amplification product. These operations can be carried out in a system that comprises several integrated modules, including an analyte preparation module; a detection and analysis module and a control module. | 05-21-2015 |
| 20150346147 | PIPETTES, METHODS OF USE, AND METHODS OF STIMULATING AN OBJECT OF INTEREST - One embodiment of the invention provides a system adapted and configured to generate a localized flow circulation zone. The system includes: a free-standing microfluidic pipette comprising three or more channels with exits separated from each other by an outer surface of the pipette; and a controller programmed to control fluid flows through each of the three or more channels to generate a localized recirculating fluid flow path outside the pipette. Liquid leaving the microfluidic pipette through at least one outlet channel exit is withdrawn through at least two inlet channel exits. | 12-03-2015 |
| 20160061819 | METHOD FOR MEASUREMENT OF THROMBOCYTE FUNCTION - With a method for measurement of thrombocyte function, a solution is created, by which the sensitivity of individual thrombocytes can be measured with the least possible apparatus effort, with high throughput, by passing a liquid thrombocyte solution, in which the thrombocytes are present in isolated form, into a microfluidic chamber and brought into contact with at least one stimulant, wherein an electrical field directed transverse to the entry direction of the thrombocyte solution is applied to the chamber, and the movement path of the thrombocytes in the electrical field is observed and evaluated, in such a manner that thrombocytes having a movement path directed in the direction toward the minus pole of the electrical field are classified as non-activated thrombocytes, and thrombocytes having a movement path directed in the direction toward the plus pole of the electrical field are classified as activated thrombocytes. | 03-03-2016 |
| 20160077053 | ANALYSIS METHOD, ANALYSIS CHIP, AND ANALYSIS SYSTEM - A method is provided for analyzing a sample using capillary electrophoresis. According to the method, an electrophoretic liquid filling step is performed for filling a capillary tube with an electrophoretic liquid. In an introducing step, a predetermined amount of sample is introduced to an introducing tank linked to the capillary tube. In a flow step, performed after the introducing step, the sample is caused to flow in the introducing tank, thereby generating a shear flow at a link portion between the capillary tube and the introducing tank. In an electrophoresis step, electrophoresis is performed in the capillary tube while the sample is continuously supplied. | 03-17-2016 |
| 20160082437 | COVER WITH MICRO-CONTAINER INTERFACE FOR COVERING A MICROFLUIDIC GAP | 03-24-2016 |
| 20160178577 | NANOPORE-BASED SEQUENCING WITH VARYING VOLTAGE STIMULUS | 06-23-2016 |
| 20160250637 | VIRTUAL DETERMINISTIC LATERAL DISPLACEMENT FOR PARTICLE SEPARATION USING SURFACE ACOUSTIC WAVES | 09-01-2016 |
