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| Number | Title | Issue Date |
| 7481097 | Method and device for measuring the surface tension of liquids A method and device for measuring the surface tension of liquids uses the bubble pressure principle, wherein a parameter relating to a bubble formed using a defined gas mass flow rate or volume flow rate is measured at the tip of a capillary tube immersed in the liq... | 01/27/2009 |
| 7266995 | Method and instrument for measuring surface tension For measuring the surface tension between a liquid and fluid such as a gas, a capillary (3, 3′) is used in which the liquid slowly flows and at the end of which drops (11) are formed, falling off into a closed space (7) containing the fluid. U... | 09/11/2007 |
| 7244770 | Method for evaluating an optimal dosage of defoamers in a fermentation process Methods suitable for selecting optimal defoamers for use in fermentation processes are described wherein the methods comprise: (a) determining an amount of each of two or more defoamers which provides a requisite dynamic surface tension of at most 50 mN/m at a parti... | 07/17/2007 |
| 7155962 | Method and apparatus to study a surfactant The invention relates to a method of and an apparatus for studying properties, especially physical properties of a surfactant. A fluid is introduced in the form of a sample volume in another fluid which is immiscible with said fluid so that an interface is formed be... | 01/02/2007 |
| 7097705 | Cationic-anionic blends for dynamic surface tension reduction This invention provides water-based compositions, particularly coating, ink, adhesive, fountain solution and agricultural compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of a surface tension reducing amount of a mixture... | 08/29/2006 |
| 7010962 | Characterization of liquids using gas bubbles An apparatus and method is described for measuring properties of bubbles from which certain physical characteristics of the liquid in which the bubbles are generated can be determined. The evolution of a bubble includes (1) formation and growth at a nozzle disposed ... | 03/14/2006 |
| 6915680 | Method and system for determining surface tension using the bubble pressure method A method for determining a surface tension of a solution in a container using a bubble pressure process includes introducing a gas volume flow into the solution using a capillary. A time-dependent pressure profile of the gas volume flow is determined during bubble f... | 07/12/2005 |
| 6857309 | High throughput mechanical rapid serial property testing of materials libraries A library of materials is screened for mechanical properties such as surface tension or interfacial tension. A library of materials is provided. A stimulus such as a stress or force is provided to each member of the library. A response (e.g., a resistance) of each o... | 02/22/2005 |
| 6185989 | Device for dynamic measurement of the surface tension of a liquid The invention relates to a device for dynamic measurement of the surface tension of a liquid by the bubble pressure process. The device is characterized by a moving measuring device with a flexible lead, conveying at least compressed air, to a sensor head... | 02/13/2001 |
| 6085577 | Surface tension measurement in a pressurized environment Method and apparatus for measuring the surface tension of a liquid inside a vessel (2), reactor, or inside a section of flow-through process pipe that is pressurized above normal ambient pressure, up to but not limited, to 100 psig (7000 kPa), includes a ... | 07/11/2000 |
| 5361627 | Method and apparatus for the measuring the capillary attraction developed at a surface of an absorbent body A method and apparatus for measuring the capillary attraction developed at a surface of an absorbent body intended to be used in a sanitary article such as a sanitary napkin, a diaper, a urinary pad, an adult brief, a tampon or a wound dressing, among oth... | 11/08/1994 |
| 4970892 | Method and apparatus for determining surface tension or if a surfactant will keep a narrow passageway open A method and apparatus for determining if a surfactant will keep a narrow passageway open. The apparatus includes a glass tube having first and second end portions and an intermediate necked-down portion including a relatively narrow center and tapered fi... | 11/20/1990 |
| 4527421 | Dynamic surface tensiometry and method An improved apparatus and method are disclosed for measuring the dynamic surface tension at a gas-liquid interface by the maximum bubble pressure method. The gas is bubbled out an orifice tube dipped in the liquid; the maximum pressure in each bubble is a... | 07/09/1985 |
| 4416148 | Surface tensiometer Apparatus for measuring the surface tension of a liquid contained in a flow-through pressure vessel (60) includes a pair of tubes (50,51) having small and large orifices positioned below the surface of the liquid. A source (10) provides gas through a pres... | 11/22/1983 |
