| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073230390 | Column detail | 33 |
| 20090031785 | Capacitively coupled dielectric barrier discharge detector - A gas detector designed for use with a gas chromatography system, or alone, comprising a tubular inner electrode, a tubular outer electrode coaxial with the inner electrode, and a dielectric tube axially between the inner electrode and the outer electrode. The dielectric tube serves as a dielectric barrier between the inner electrode and the outer electrode. There is a longitudinal gap between the left end of the outer electrode and the right end of the inner electrode, and a sufficient voltage is applied across the gap between the electrodes to create an electrical discharge which emits light from a gas passing through the gap. The light is then detected and analyzed to determine the chemical constituents of the gas passing through the gap. | 02-05-2009 |
| 20090320560 | RECIRCULATING TEMPERATURE WAVE FOCUSING CHROMATOGRAPHY - Systems and methods for performing chromatography separations or analyses are disclosed. The methods are based upon an equilibrium gradient focusing mode in contrast to conventional transient migration-based modes. By matching the migration speed of one or more analyte(s) of interest to the wave speed of a thermal gradient induced to travel along a region in which chromatographic partitioning occurs, significant improvements in detection limits are achieved. In particular, a temperature gradient focusing strategy is described in which analyte(s) of interest are circulated around a continuous chromatography system in order to focus the analyte(s). Also described are various devices and systems that can be used in the methods described herein. | 12-31-2009 |
| 20100005855 | LOW THERMAL MASS, ADJUSTABLE LOCKING GC NUT - A connector for fastening a gas chromatography capillary column to chromatography equipment includes a securing nut and ferrule on a first portion of the connector for releasably holding the capillary column in a position relative to a second portion of the connector. The first portion rotates relative to the first portion and translates a limited amount relative to the first portion. A pin on the first portion extending into an annular groove around a circumference of the first portion may allow this rotation and limited translation. The second portion has a threaded end adapted to screw into the chromatography equipment with the first portion remaining relatively rotation free as the second portion is screwed into place. | 01-14-2010 |
| 20100050741 | Comprehensive two-dimensional gas chromatography method with one switching valve as the modulator - The present invention is an improvement to two-dimensional comprehensive gas chromatography. The improvement is a one valve switching modulator connecting the two separation columns. The valve includes either a two position eight-port valve or a two position twelve-port valve, and two transfer lines. | 03-04-2010 |
| 20100107730 | Gas sample introduction device and a gas chromatograph using the same - A gas sample introduction device for introducing sample gas to a gas analyzer includes a measuring tube, a sample gas supply flow path for introducing the sample gas to the measuring tube, | 05-06-2010 |
| 20110011156 | NATURAL GAS ANALYZER ON A MICRO-CHIP - A miniaturized gas analyzer formed onto a micro-chip and a method of separating components from a composite gas using the miniaturized gas analyzer are disclosed. The gas analyzer includes an injector block and two column blocks arranged in series along an analytical path. The injector block receives the composite gas and a carrier gas to create a gas sample. The gas sample is then injected into the column blocks to separate the components of the composite gas. Further, a valve used within the miniaturized gas analyzer is disclosed, in which the valve is formed onto the micro-chip and includes a flexible membrane and a rigid substrate. | 01-20-2011 |
| 20110197655 | MULTI-LAYERED CERAMIC MICRO-GAS CHROMATOGRAPH AND METHOD FOR MAKING THE SAME - A micro-gas chromatograph column is formed by texturing a channel into a plurality of green-sheet layers, which are then sintered together to form a substantially monolithic structure. A thick-film paste may be added to the channel textured in the green-sheet layers to provide a porous plug sintered in the micro-gas chromatograph column in the substantially monolithic. A thermal conductivity detector is formed in the substantially monolithic structure by depositing a conductive thick-film paste on the surface of one of the green-sheet layers to define a resistor in an exit channel of the micro-gas chromatograph column. | 08-18-2011 |
| 20110226040 | FOLDED PASSAGE GAS CHROMATOGRAPHY COLUMN - Embodiments of the present invention provide columns for use in gas chromatography and methods of making and using such columns. The present invention provides a folded passage column: a fluid passage formed by joining a first channel in a first surface through a slot to a second channel in a second surface. In some embodiments, a folded passage column repeats that building block, joining a plurality of channels in a first surface with a plurality of channels in a second surface such that the channels link to form a continuous passage. | 09-22-2011 |
| 20120006095 | MODULAR GAS CHROMATOGRAPH - This invention is related to a gas chromatograph wherein more substitutable modules are foreseen, in particular injector modules and/or detector modules, as well as one embodiment in an oven module. Each module is insertable in a seat of the gas chromatograph mainframe with fast connections of its electronic and pneumatic means to corresponding outlets on said mainframe. Each module has its own heating element. | 01-12-2012 |
| 20120017667 | COLUMN AND METHOD OF EVALUATION OF CONTAMINATED CONDITION OF GAS - A gas adsorbing column filled with a filler composed of an adsorbent supported on a substrate having an average particle size or cross-sectional average diameter of 500 μm to 1000 μm, wherein the void volume of the column is 5 to 100 μl. | 01-26-2012 |
| 20120060586 | Chromatography Assembly - Chromatography assembly for multi-dimensional chromatography, includes a first separating column ( | 03-15-2012 |
| 20120085148 | FAST GAS CHROMATOGRAPH METHOD AND DEVICE FOR ANALYZING A SAMPLE - In a fast gas chromatograph (GC) method and device for obtaining fast gas chromatography analysis, a capillary gas chromatography column is inserted into a resistively heated metal tube located mostly outside a standard gas chromatograph oven, which may serve as a heated transfer line to a flexible column that enters the resistively heated metal tube from its injector and exits into its detector. The fast GC device enables less than one minute full range temperature programming and cooling back analysis cycle time. The fast GC according to one embodiment is combined with mass spectrometry with supersonic molecular beams for the provision of fast analysis cycle time together with highly informative mass spectral information for improved sample analysis and identification. | 04-12-2012 |
| 20120198913 | COLUMN ASSEMBLY FOR A GAS CHROMATOGRAPH - A column assembly for gas chromatography, which is coolable by a fluid, includes a capillary column, a heating element for heating at least a portion of the capillary column, and a tube having a lumen and in contact with at least one of the capillary column and the heating element. When energized, the heating element raises the temperature of the capillary column. To lower the temperature of the capillary column, a fluid flows through the tube, and heat is transferred from the capillary column to the fluid in the tube. | 08-09-2012 |
| 20130025347 | GAS CHROMATOGRAPH PROVIDING SEMI-AUTOMATIC IDENTIFICATION OF CONNECTED SAMPLE FLOW COMPONENTS, AND METHOD OF OPERATING SAME - A method for semi-automatically generating configuration information for a gas chromatograph uses an identification device reader of the gas chromatograph to 1) determine a presence and location of sample flow component identification devices in or on identification device holders that hold the sample flow component identification devices; 2) read information from sample flow component identification devices held in the identification device holders; and 3) output configuration information for the gas chromatograph. The configuration information is based on the presence and location of particular sample flow component identification devices in or on particular identification device holders, and on associations of particular identification device holders with particular sample flow component connections to the gas chromatograph. The configuration information indicates if and how sample flow components are connected to the gas chromatograph. | 01-31-2013 |
| 20130125620 | METHOD AND APPARATUS FOR INSPECTING A GAS SAMPLE - An apparatus for detecting a presence of at least one analyte in a gas sample. The apparatus comprises a pump for drawing a gas sample from an ambient air, a passage having first and second ends, a chamber connected to the first end and containing a concentrating element for collecting at least one analyte from the gas sample, a chromatographic separator connected to a second end of the passage, and a gas source for streaming a carrier gas via the chamber to transfer the at least one analyte toward at least one chemical detector, via the chromatographic separator, in a first direction. The pump draws the gas sample via the chamber in a second direction and the first and second directions are substantially opposing to one another. | 05-23-2013 |
| 20130125621 | SYSTEM FOR ANALYZING A GAS MIXTURE INCLUDING AT LEAST ONE CHROMATOGRAPHY COLUMN - A system for analyzing a gas mixture, including at least one chromatography column, a mechanism injecting the mixture into the column, and a mechanism detecting compound(s) forming the gas mixture, the detection mechanism including at least one detector of nanosensor type of an outlet of the column and a detector of nanosensor type in the column, capable of detecting passage of the compounds. It is then possible to determine the velocity of each of the compounds within the system. | 05-23-2013 |
| 20130133402 | MULTI-LAYER CHIP FOR GAS CHROMATOGRAPHY AND FABRICATION METHOD THEREOF - Disclosed herein are a multi-layer chip for gas chromatography and a method of fabricating the multi-layer chip. The multi-layer chip is fabricated by: forming fine channels at the same positions of a plurality of substrates using only a single photo mask and an alignment key; and stacking the substrates. That is, the multi-layer chip can be fabricated by a simple method, and the total length of the fine channels can be increase without a limit by stacking more substrates. In addition, layers of the substrates can be coated with different stationary phases, and a temperature control device can be attached to heat transfer contact portions of the multi-layer chip for controlling the temperature of the multi-layer chip rapidly and precisely. Therefore, the multi-layer chip may be useful for high-separability gas chromatography to separate and analyze an infinitesimal amount of a sample. | 05-30-2013 |
| 20130174642 | Micro-Fabricated Chromatograph Column with Sputtered Stationary Phase - A micro-fabricated chromatography column ( | 07-11-2013 |
| 20130192340 | GAS CHROMATOGRAPHY - INVERSE GAS CHROMATOGRAPHY COMBINED ANALYSIS DEVICE - The present invention provides a gas chromatography—inverse gas chromatography combined analysis device, which includes a gas chromatography column and an inverse gas chromatography column, an input end of the gas chromatography column is connected to a sample feeder, an output end of the gas chromatography column is connected to an input end of the inverse gas chromatography column, the output end of the gas chromatography column is further connected to a first detector, the input end of the inverse gas chromatography column is further connected to a carrier gas tube, an output end of the inverse gas chromatography column is connected to a second detector, and the first detector and the second detector are both connected to a signal collector. The present invention not only can investigate adsorption performance of a tested solid adsorption material with respect to a single probe, but also can investigate adsorption performance of different solid adsorption materials with respect to different constituents in a combined probe at the same time, thereby improving the development efficiency of the inverse gas chromatography technologies. | 08-01-2013 |
| 20130199267 | Chromatography Column Amenable to Accurate Length Determination and Laser Adapter - A column used for gas chromatography (GC) is fabricated from an open tubular light guiding capillary. The light guiding capillary is suitable for transmission of optical frequencies employed in commercially available hand held laser range finders. | 08-08-2013 |
| 20130333444 | Plate-Type Column, Temperature Regulation System and Gas Chromatograph System - Provided is a plate-type column which allows the temperature of its inner passage to be rapidly increased or decreased while ensuring the correctness of an analysis or other operations. A plate-type column | 12-19-2013 |
| 20140026637 | MICRO-DEVICE FOR ANALYSIS BY GAS PHASE CHROMATOGRAPHY OFFERING GREAT COMPACTNESS - Device for analysis by gas phase chromatography comprising:
| 01-30-2014 |
| 20140047900 | FAST GAS CHROMATOGRAPH METHOD AND DEVICE FOR ANALYZING A SAMPLE - A fast gas chromatograph (GC) method and device for obtaining fast gas chromatography analysis, in which a capillary gas chromatography column is inserted into a resistively heated metal tube located mostly outside a heated oven, which serves as a heated transferline to a flexible column that enters a resistively heated metal tube from a gas chromatograph injector and exits into a gas chromatograph detector. The resistively heated metal tube of the fast GC device has an internal diameter that is over twice the external diameter of the GC column so as to enable the insertion of several capillary GC column loops. The process of column insertion into or removal from the heated tube is aided by touching it with an ultrasound vibrating device that remarkably reduces the friction during column insertion into the metal tube heater. | 02-20-2014 |
| 20140060151 | COMPREHENSIVE TWO-DIMENSIONAL GAS CHROMATOGRAPH AND MODULATOR FOR THE CHROMATOGRAPH - A modulator for simply providing fast and precise sampling of a chromatographic peak eluting from a first column into a second column of a comprehensive two-dimensional gas chromatograph, where the modulator includes a planar component containing a first gas passage for connecting a carrier gas source to the second separation column, a second gas passage for connecting the first separation column to an exhaust outlet, a connecting gas passage between the first and second gas passages, and two individually controllable open/close valves arranged in parallel connection in the first gas passage between its connection to the carrier gas source and the branch-off of the connecting gas passage, and where the gas passages and valves are formed in the planar component by micromachining. | 03-06-2014 |
| 20140250978 | Evacuable Inlet for Gas Chromatograph Injector - A gas chromatography (GC) system comprises: a sample injector adapted to receive a liquid sample into an interior cavity thereof and to volatilize the liquid sample; a GC column configured to receive the volatilized sample from the sample injector; a carrier gas inlet line fluidically coupled to a gas inlet port of the sample injector; a septum purge vent line fluidically coupled to a first gas outlet port of the sample injector; a split-flow vent line fluidically coupled to a second gas outlet port of the sample injector; and a vacuum system configured to apply vacuum to the septum purge vent line, the split-flow vent line and the interior cavity of the sample injector. Alternatively, the vacuum system may be coupled to a vacuum port of the sample injector. A separate flow of helium gas may be supplied to an inlet of the GC column. | 09-11-2014 |
| 20150020575 | SYSTEM FOR ANALYZING A GAS MIXTURE INCLUDING AT LEAST ONE CHROMATOGRAPHY COLUMN - A system for analyzing a gas mixture, including at least one chromatography column, a mechanism injecting the mixture into the column, and a mechanism detecting compound(s) forming the gas mixture, the detection mechanism including at least one detector of nanosensor type of an outlet of the column and a detector of nanosensor type in the column, capable of detecting passage of the compounds. It is then possible to determine the velocity of each of the compounds within the system. | 01-22-2015 |
| 20150316517 | DEVICE COMPRISING A FLUID CHANNEL PROVIDED WITH AT LEAST ONE MICRO OR NANOELECTRONIC SYSTEM AND METHOD FOR CARRYING OUT SUCH A DEVICE - Device including a substrate including at least one microelectronic and/or nanoelectronic structure (NEMS) having a sensitive portion and a fluid channel. The fluid channel includes two lateral walls, an upper wall connecting the two lateral walls, a lower wall formed by the substrate, and at least two openings in order to provide a circulation in the fluid channel, with the openings being defined between the two lateral walls, with the structure being located inside the fluid channel. Electrical connection lines extend between the structure and the outside of the fluid channel, with the connection lines being carried out on the substrate and passing under the lateral walls. The device also includes an intermediate layer having a planar face in contact with base faces of said lateral walls. The connection lines are at least partially covered by the intermediate layer at least immediately above base faces of the lateral walls. The lateral walls are made sealingly integral on the substrate by a sealing layer on the intermediate layer. | 11-05-2015 |
| 20160069845 | THERMALLY MODULATED VARIABLE RESTRICTOR FOR NORMALIZATION OF DYNAMIC SPLIT RATIOS - A chromatography system includes a separation column that separates a sample carried by a compressible mobile phase flow into analytes and a splitter in fluidic communication with the separation column to receive and divide the compressible mobile phase flow into first and second mobile phase streams in accordance with a split ratio. A thermally modulated variable restrictor is coupled between the splitter and a detector. The restrictor receives the first mobile phase stream from the splitter and has a temperature element in thermal communication with the first mobile phase stream to exchange heat therewith. A controller, in communication with the restrictor, dynamically adjusts a temperature setting of the temperature element of the restrictor to adjust the heat exchange between the thermally modulated variable restrictor and the first mobile phase stream in order to keep the split ratio constant throughout a chromatographic run. | 03-10-2016 |
| 20160077063 | Gas Chromatography (GC) Column Heater - An apparatus for heating a GC column is described. The apparatus includes first and second temperature sensors. Temperature data are used to set power provided to a heating element of the apparatus. | 03-17-2016 |
| 20160077064 | Gas Chromatography (GC) Column Heater - A gas chromatography (GC) column heating apparatus is described. The GC column heating apparatus includes a first substrate; a heating element disposed over the first substrate; and a second substrate. A gas chromatography (GC) column heating and cooling apparatus is also described. The GC column cooling and heating apparatus includes a housing configured to receive a heating apparatus, the heating apparatus comprising a first side and a second side; a first thermal insulation layer disposed over the first side; a second thermal insulation layer disposed over the second side; and an actuator connected to the housing and configured to move the first and second thermal insulation layers in contact with the first and second sides, respectively, during a heating sequence, and to move the first and second layers of insulation out of contact with the first and second sides, respectively, during a cooling sequence. | 03-17-2016 |
| 20160139088 | METHOD AND APPARATUS FOR INSPECTING A GAS SAMPLE - An apparatus for detecting a presence of at least one analyte in a gas sample. The apparatus comprises a pump for drawing a gas sample from an ambient air, a passage having first and second ends, a chamber connected to the first end and containing a concentrating element for collecting at least one analyte from the gas sample, a chromatographic separator connected to a second end of the passage, and a gas source for streaming a carrier gas via the chamber to transfer the at least one analyte toward at least one chemical detector, via the chromatographic separator, in a first direction. The pump draws the gas sample via the chamber in a second direction and the first and second directions are substantially opposing to one another. | 05-19-2016 |
| 20160139089 | METHOD AND APPARATUS FOR INSPECTING A GAS SAMPLE - An apparatus for detecting a presence of at least one analyte in a gas sample. The apparatus comprises a pump for drawing a gas sample from an ambient air, a passage having first and second ends, a chamber connected to the first end and containing a concentrating element for collecting at least one analyte from the gas sample, a chromatographic separator connected to a second end of the passage, and a gas source for streaming a carrier gas via the chamber to transfer the at least one analyte toward at least one chemical detector, via the chromatographic separator, in a first direction. The pump draws the gas sample via the chamber in a second direction and the first and second directions are substantially opposing to one another. | 05-19-2016 |
| 20160178602 | ANALYTICAL METHOD FOR DETECTING FUEL MARKERS | 06-23-2016 |
