| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073640480 | Surface tension | 18 |
| 20080202219 | Device for Using with a Sensor for Improving Accuracy, and Sensor with an Improved Accuracy - The invention relates to a sensor for measuring the water content or moisture content in a solid matter medium, in particular to a ground humidity sensor, as well as to a device for use with a sensor for improving its accuracy. The sensor, or at least the region of the sensor designed for measurement, is surrounded by an interface, the interface absorbing and releasing moisture, as well as designed in a mechanically flexible manner, such that the interface may be adapted to a non-constant or not clearly defined surface of the solid matter medium surrounding the sensor, i.e. to the earth. By way of this, the contact surface between the sensor and the medium is optimized, and air gaps, impressions of stones, etc., are compensated or bridged. The interface is preferably manufactured of a felt of plastic fibers, and is exchangeably attached via a sensor or sensor head. | 08-28-2008 |
| 20090019923 | Method for measuring octanol-water distribution coefficients of surfactants - The present invention provides a procedure for determining the octanol-water distribution coefficient P of a surface-active substance by means of the following steps:
| 01-22-2009 |
| 20090133479 | Handheld Tensiometer Featuring Automatic Regulation of the Bubble Life by Measuring and Regulating the Gas Volume FLow - A hand tensiometer for measuring the surface tension of liquids or for measuring of substance concentrations in a liquid wherein a gas volume stream entered from a gas source ( | 05-28-2009 |
| 20090249866 | METHODS AND APPARATUS FOR ULTRASONIC COUPLING USING MICRO SURFACE TENSION AND CAPILLARY EFFECTS - Apparatus and methods for ultrasonic coupling between a coupling fluid and an object using micro surface tension and capillary effects are provided. The apparatus may include a chamber comprising a wall, a bottom, and a fluid inlet. The fluid inlet may allow a fluid to enter the chamber. Portions of the wall may have a number of slits with dimensions that allow a controlled overflow of the fluid to hold a top surface of the fluid in a stable contact with the object when the fluid is flowing into the chamber. The object may be located at a distance from the top of the wall. Additional apparatus and methods are disclosed. | 10-08-2009 |
| 20130145829 | DIHEDRAL SENSOR FOR EVALUATING TENSION, POTENTIAL AND ACTIVITY OF LIQUIDS - In the dihedral sensor system, two flat plates are secured to a dihedron so that the distance (L) between the edge and the meniscus and the spacing between the plates (a) on the meniscus will be a function of the dihedron tangent (α). Thus, for pure water the tension (Ψ) is equal to the potential (T) and given by T=−2σ/[L tg(α)], wherein σ is the water surface tension. In order to measure water tension in the soil, the system is coupled to porous elements, while the sensor edge is pressed directly against roots and other plant organs. Water potential, instead, is measured with the edge positioned at a few micrometers from the sample and the response takes place after the exchange of a few picoliters of water, when the condition of balance of temperature and water vapor is approached. Visually, with a sliding gauge, one measures water tensions between zero and 0.3 MPa, while with the aid of a microscope the reading extends up to 3.0 MPa. The water activity corresponding to water potentials lower than −3.0 MPa can also be measured by adding a known number of molecules of solutes suitable for the water kept in the sensor. | 06-13-2013 |
| 20140311229 | DETERMINATION OF INTERFACIAL OR SURFACE TENSION - A method and apparatus for measuring interfacial or surface tension of a first fluid dispersed in a second fluid, the method involving providing at least one substantially spherical droplet or bubble of the first fluid in a flowing stream of the second fluid in a flow channel, followed by passing the flowing stream comprising the droplet or bubble through a constriction in the flow channel, the constriction being sufficiently constricting so as to cause the droplet or bubble to deform away from its substantially spherical shape and measuring and comparing a physical property of the flowing stream both before and after the constriction, wherein the physical property changes as a result of the deformation of the droplet or bubble, and thereby inferring the interfacial or surface tension from the measured physical property. | 10-23-2014 |
| 20140360252 | METHOD OF MANUFACTURING PATTERN SUBSTRATE AND METHOD OF LOCATING COMPONENT - There is provided a method of manufacturing a pattern substrate in which a pattern is formed on the surface of the substrate. The manufacturing method includes a step of preparing the substrate and a step of arranging a liquid-repellent or lyophilic material on the surface of the substrate so as to form the pattern on the surface of the substrate in which the surface of the substrate has a liquid-repellent region and a lyophilic region, the pattern is formed by one of the liquid-repellent region and the lyophilic region and the pattern is used to locate a component by the surface tension of a liquid member. | 12-11-2014 |
| 20150033833 | Method and Device for Determining Solid Particle Surface Energy - A method of determining solid particle surface energy includes placing solid particles in a container made of a very high surface energy material and pouring a liquid into the container. The method further includes tilting the container to drain out from the container a first subset of the solid particles floating at a top surface of the liquid and tilting the container to move the liquid away from a second subset of the solid particles that are below the top surface. The method also includes tilting the container to move the liquid back toward the second subset of the solid particles such that at least a portion of the second subset of particles floats at the top surface of the liquid and tilting the container to drain out from the container the portion of the second subset of the solid particles now floating at the top surface of the liquid. | 02-05-2015 |
| 20160033383 | PORTABLE SENSORS FOR DETERMINATION OF LIQUID SURFACE TENSION, AND METHODS OF USES THEREOF - The present invention relates to the measurement of liquid surface tension using a small, portable sensor. More specifically, the present invention relates to a sensor on which a droplet of the sample liquid is placed and quickly either wets and changes color or remains non-wetted for several minutes. The detection range of this type of sensor is tunable to surface tensions useful for detecting surfactant levels in water, biological liquids, and other liquids, making it useful for a variety of medical, veterinary, home-care, environmental, and global health applications. | 02-04-2016 |
| 20160186101 | POLYMERIC AGENTS THAT IMPROVE PRIMARY WASHING EFFICIENCY - The primary washing power of washing and cleaning agents was to be improved, in particular with respect to oil- and/or fat-containing stains. This was achieved substantially by the incorporation of polymers having an aggregation parameter X | 06-30-2016 |
| 073640510 | By pressure | 4 |
| 20090133480 | Methods and device for fast creation of fluid interfaces and use of this device for determination of liquid-liquid and liquid-gas interfacial properties - The invention proposes new methods for fast fresh surface formation of a drop or bubble of a test fluid and a device to realize the new methods to determine the dynamic or equilibrium surface/interfacial tension (ST/IFT) of this liquid. The methods are implemented by means of a single device which is used both for dynamic and equilibrium measurements of the ST/IFT. Depending on the method, the determination of the ST/IFT can be performed either by Axisymmetric Drop Shape Analysis (ADSA) or Capillary Pressure Method (CPM) or both. In addition, with this device the Drop Volume Method and Stopped Jet Method can be realized, which has been modified and improved with the proposed invention in comparison with the known methods. The combination of several methods for creating a fresh surface and of two techniques for determining ST/IFT in a single device allows choosing the most suitable method for a given fluid system considering the system properties and desired time range. The proposed device consists of the following components:
| 05-28-2009 |
| 20110197663 | SURFACE TENSION MEASURING DEVICE AND METHOD THEREOF - A surface tension measuring device and a method thereof are revealed. The surface tension measuring device includes a container and a hole. A liquid analyte is filled into the container and the hole is disposed on a wall surface of the container while the liquid analyte forms a drop on the hole. The surface tension of the liquid analyte is correlated with an internal gas pressure inside the container, an external gas pressure outside the container and a level of the liquid analyte. Thus the surface tension of the liquid analyte is obtained by control of the increasing of the liquid analyte level or pressure difference inside and outside the container. Therefore, the reduction of measuring time, less space occupied, lower equipment cost and reduced operation complexity are achieved. | 08-18-2011 |
| 20120079876 | MICROTENSIOMETER SENSOR, PROBE AND METHOD OF USE - A microtensiometer sensor includes a substrate layer fluidly coupled to an enclosed reservoir. A porous membrane is disposed on a surface of the substrate layer. The membrane defines a liquid side fluidly coupled to the reservoir and a vapor side fluidly coupled to a vapor interface. The porous membrane includes a plurality of through holes fluidly coupling the liquid reservoir to the vapor interface, and a nanoporous filler material disposed within the plurality of through holes. The filler material includes a plurality of open pores having a maximum diameter in the range of 0.2 to 200 nanometers. In one embodiment, the microtensiometer sensor includes a molecular membrane disposed adjacent to the vapor side of the porous membrane. In one example, the molecular membrane is formed of a highly crystalline polytetrafluoroethylene polymer having a microstructure characterized by nodes interconnected by fibrils. In one application, the microtensiometer sensor may be used in a probe to measure the average water potential within a network of plant or tree xylem. In another application, the microtensiometer sensor may be useful in real-time determination of the water potential in soil. | 04-05-2012 |
| 20130067999 | Method for Selection of Surfactants in Well Stimulation - A method of determining the suitability of a surfactant for use in a formation can include sampling water in the formation, providing at least two surfactants, and mixing each of the surfactants with the formation water to form surfactant/water samples. The method can further include determining the solubility of each surfactant with the formation water, comparing the solubility of each surfactant with the other surfactant, and assigning a solubility performance value for each surfactant based on its solubility in the formation water sample compared to the other surfactant. | 03-21-2013 |
| 073640520 | Liquid droplet | 4 |
| 20090019924 | Microfluidic Sensor for Interfacial Tension Measurement and Method for Measuring Interfacial Tension - A microfluidic sensor is disclosed that has a first inlet channel for a first fluid, a second inlet channel for a second fluid, and a measurement channel intersecting with both first inlet channel and the second inlet channel. A signal source system is provided for receiving a signal from a signal emitter, as is a signal detection system for receiving the signal from the signal source system. The signal source system and the signal detection system are for recording physical characteristics of at least one of the droplets in the measurement channel. A corresponding method is also disclosed. | 01-22-2009 |
| 20090205410 | APPARATUS FOR MEASURING SURFACE TENSION - An apparatus for measuring surface tension includes: a U-shaped communicating tube having a base section that defines a horizontal line, and first and second sections that extend from the base section, and that respectively have first and second top open ends distal from the base section; and a capillary connected to the second top open, and having a top open end. The U-shaped communicating tube has a diameter greater than that of the capillary such that the U-shaped communicating tube does not exhibit capillary property when a liquid is filled therein. The first top open end has a height relative to the horizontal line that is greater than that of the top open end of the capillary such that the height difference therebetween is greater than that between the liquid level at the first section and a liquid drop formed on the top open end of the capillary. | 08-20-2009 |
| 20100024529 | DEVICE AND METHOD TO MEASURE WETTING CHARACTERISTICS - Described herein are a device and method for measuring the wetting characteristics of a liquid on a surface of a material by depositing a volume of liquid on the surface of the material, imparting kinetic energy to the liquid, and obtaining information about the geometry of the volume of the liquid on the surface. The device includes a liquid dispensing component, a kinetic energy imparting component, a position determining component, and a data generating component. | 02-04-2010 |
| 20130298649 | MEASUREMENT OF INTERFACIAL PROPERTY - Interfacial tension between first and second immiscible liquids is determined using a device in which entrance and exit channels are connected by a cavity with wider cross-section. A flow of the first liquid enters the cavity as a jet and breaks into droplets within the cavity. Passage of a droplet through the exit channel feeds back to perturb the jet entering the cavity. An alternating signal applied to a heating element perturbs the incoming jet and is progressively scanned over a frequency range which includes the system's resonant frequency (frequency of droplet formation with no signal to the heating element). A bandwidth of frequency is observed in which the frequency of droplet formation is phase locked to the frequency applied to the heater. The ratio of resonant frequency to this bandwidth is a measurement of the interfacial tension between the two liquids. | 11-14-2013 |
