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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7926326 | System and method for interfacial rheometry An apparatus and method for performing rheological measurements of interfaces located at the top of fluid sub-phases. In one configuration, a rotating rheometer is provided with a chamber wall whose inner surface defines an outer chamber radius and an inner cylinder... | 04/19/2011 |
| 7475592 | Rheometer A rheometer die with a groove configuration for reducing sample slippage in a rheometer chamber is provided. The rheometer die includes a surface and at least one radial groove extending into the surface. The groove defines at least a portion of a sample-holding cha... | 01/13/2009 |
| 7444855 | Orthogonal rheometer Device for measuring the rheological properties of a viscoelastic material, formed of an upper rotating plate (10) and of a lower rotating plate (20) which are able to press against the opposite faces of a sample S of the material to be measured. The a... | 11/04/2008 |
| 7392842 | Proppant suspension testing devices and methods of use An apparatus for testing a rheological property of a fluid with a particulate includes: (a) a receptacle having a cylindrical side wall enclosed by a bottom wall defining a cavity for receiving a fluid to be tested; (b) an axial support adapted to be positioned in t... | 07/01/2008 |
| 7380442 | On-line rotational/oscillatory rheometrical device The present invention refers to an on-line rotational/oscillatory rheometrical device inserted in the barrel of an extruder (1), composed of a main body (2), a cleaning ring (5) and a lower support (6), kept at a constant temperature, and... | 06/03/2008 |
| 7367237 | MEMS vascular sensor A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the subst... | 05/06/2008 |
| 7367224 | Rheometer and method for temperature control of its measuring chamber A rheometer has a measuring chamber which is delimited by a measuring chamber wall in which at least one measuring component is disposed for acceptance of a sample. The measuring chamber can have a gas flowing through it whose temperature is controlled in a desired ... | 05/06/2008 |
| 7290441 | Micro slit viscometer with monolithically integrated pressure sensors An improved micro slit viscometer includes a combined micrometer depth rectangular slit flow channel with monolithically integrated multiple pressure sensors in the flow channels and a pumping system that injects a test sample to the channel at a desired flow rate. ... | 11/06/2007 |
| 7249523 | Apparatus and method for measuring mechanical properties A rheological measurement can be made comprising the steps of disposing a sample to be measured between two opposing surfaces of a fixture; coupling two opposing surfaces of the sample with a corresponding adjacent one of the two opposing surfaces of the fixture to ... | 07/31/2007 |
| 7168299 | Heat spreader for rotary rheometer A rotary rheometer having a an upper heating/cooling assembly and a lower heating/cooling assembly located opposite one another opposite a sample gap. The lower heating/cooling assembly may comprise a Peltier heater and the upper heating/cooling assembly preferably ... | 01/30/2007 |
| 7073372 | Online rotating viscometer and associated measurement methods Rotating type viscosimeter having a motor (2) for driving a rotating assembly (3) extending through an aperture (4) into a liquid to be tested (1) and measuring the shear forces imparted by said liquid (1) to the rotating assembly ... | 07/11/2006 |
| 7055376 | Method and a pump apparatus for the generation of an adjustable, substantially constant volume flow of a fluid and a use of this method A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a ... | 06/06/2006 |
| 7049147 | Method for process line testing An apparatus capable of characterizing the fluid content of chemicals in a reaction line comprises a rheometer. The apparatus can be connected to or included in a reaction flow stream, and has a retractable wall 26 that opens to provide an opening 28 t... | 05/23/2006 |
| 7047794 | Tether plate sensor for measuring physical properties of fluid samples The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine ... | 05/23/2006 |
| 7024920 | Lubricity measurement using MEMs sensor A system that facilitates in situ determination of lubricity in a fluid comprises a multi-element sensor positioned within a machine, wherein the multi-element sensor obtains data regarding a plurality of parameters of a fluid. A component calculates lubricity of th... | 04/11/2006 |
| 7021123 | Rheological and calorimetric testing method Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resist... | 04/04/2006 |
| 7017393 | Rotary rheometer magnetic bearing A rotary rheometer having a magnetic thrust bearing. The thrust disk of the magnetic thrust bearing being situated between a pair of magnetic actuator assemblies and extending beyond the circumference of the actuator assemblies so as to encompass the magnetic flux l... | 03/28/2006 |
| 6997045 | Rheomixer device Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resist... | 02/14/2006 |
| 6988393 | Apparatus for determining rheological properties An apparatus (1) including two plates (3, 4) which can be rotated in relation to each other and between which the rheological properties of a test substance (6) disposed in an intervening area (5) can be determined. At least one of the pl... | 01/24/2006 |
| 6978662 | Rheometer A rheometer has an upper measuring part and a lower measuring part, between which a measuring chamber is formed for receiving a sample of a substance to be examined, wherein the two measuring parts can be moved relative to each other and, in particular, can be rotat... | 12/27/2005 |
| 6964737 | Systems for water and wastewater sludge treatment using floc or network strength Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation ma... | 11/15/2005 |
| 6936471 | Instrument for high throughput measurement of material physical properties and method of using same An apparatus and method for screening combinatorial libraries of materials by measuring the response of individual library members to mechanical perturbations is described. The apparatus generally includes a sample holder for containing the library members, an array... | 08/30/2005 |
| 6672141 | Viscoelastic characteristic value-measuring apparatus and method of measuring viscoelastic characteristic value In a viscoelastic characteristic value-measuring apparatus, using a split Hopkinson's bar, a first strain gauge (7) and a second strain gauge (9) are installed on an input bar (3) which is hit with a impact bar. A third strain gauge (11) and a fourth stra... | 01/06/2004 |
| 6668622 | Rheometer for rapidly measuring small quantity samples The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to... | 12/30/2003 |
| 6666073 | Apparatus for process line testing The invention relates to an apparatus and method for testing the properties of chemicals in a reaction flow stream. In the method, chemicals from the reaction flow stream are directed to the apparatus for testing the physical properties of the chemicals, ... | 12/23/2003 |
| 6584833 | Apparatus and method for analyzing well fluid sag An apparatus and method are disclosed for measuring or analyzing dynamic and static sag caused by settling of weighting materials in drilling fluids or other solids bearing fluid. The apparatus comprises a tube and shear shaft assembly that allows for a c... | 07/01/2003 |
| 6581439 | Method and apparatus for measuring viscosity of green compact sample, and computer readable medium for storing method for measuring viscosity of green compact sample A method for measuring the viscosity of a green compact sample includes the steps of finding a corrected value V' of the sample volume of the green compact sample, where the corrected value V' of the sample volume is a volume occupied by the inorganic pow... | 06/24/2003 |
| 6581440 | Process and device for determining changes in liquid media, in particular coating agents under shear stress A process and a device for determining changes in a liquid medium, in particular a liquid coating agent or its components, caused by shear stress, in which a given volume of the medium is allowed to pass repeatedly through a shear unit under reproducible ... | 06/24/2003 |
| 6534010 | Apparatus for process line testing An apparatus capable of characterizing the fluid content of chemicals in a reaction line comprises a rheometer. The apparatus can be connected to or included in a reaction flow stream, and has a retractable wall 26 that opens to provide an opening 28 that... | 03/18/2003 |
| 6523397 | Curing characteristics measuring apparatus and measuring method A curing characteristics measuring apparatus in which a sample chamber having a fixed surface and a rotation-vibrating drive surface is charged with a sample having a viscoelasticity, a torsional vibration is applied to the sample through the drive surfac... | 02/25/2003 |
| 6508106 | Method and apparatus for measuring viscosity of green compact, and computer readable recording medium for storing method for measuring viscosity of green compact A method for measuring the viscosity of a green compact includes the steps of finding a corrected value V' of the sample volume of the green compact, where the corrected value V' of the sample volume is a volume occupied by the inorganic powder in the gre... | 01/21/2003 |
| 6499336 | Rotational rheometer A rotational rheometer has an integrating motor (1), which rotates a measuring shaft (16) supporting a first measuring element (4), there being formed between this first measuring element (4) and a further, fixed measuring element (5) a measurement gap (S... | 12/31/2002 |
| 6484567 | Rheometer for rapidly measuring small quantity samples The present invention relates to a parallel rheometer and improved force sensor elements, which may advantageously be used in combination with the parallel rheometer. The parallel rheometer of the present invention allows simultaneous measurements of a pl... | 11/26/2002 |
| 6164818 | Method and apparatus for measuring viscous heating of viscoelastic materials Method and apparatus for measuring viscous heating/heat build-up of viscoelastic materials, such as rubber and polymer compounds. Temperature changes in the viscoelastic material are measured during application of a shearing force to the viscoelastic mate... | 12/26/2000 |
| 6098450 | Determination of the immobilization of colloidal coating dispersions In a proposed method for determining the immobilization of a colloidal coating dispersion which is applied to a porous substrate, the colloidal coating dispersion is applied to the porous substrate which forms a bounding surface of the measuring gap of a ... | 08/08/2000 |
| 6023962 | Reservoir-slit rheometer for the viscosity measurement of fast-reacting polymers A viscometer measures the rheological properties of polymers over a wide range of temperature, shear-rate and cure conditions, so that it can be used with extremely fast-changing resinous materials such as fast curing thermosets and fast crystallizing the... | 02/15/2000 |
| 6000279 | Rubber testing A test sample of raw or compounded rubber is squeezed from a loading chamber (7) through selectively-aligned passages (8,12) to fill an annular space (1) between a coaxial stator (5) and rotor (4). Measurements of viscous torque are provided by a sensor (... | 12/14/1999 |
| 5987969 | Apparatus and method for determining dynamic stability of emulsions An apparatus for characterizing dynamic stability of an emulsion includes a test vessel, a gap within the test vessel defined between a stationary surface and a moving surface; and an inlet for feeding an emulsion through the gap within the test vessel, w... | 11/23/1999 |
| 5948970 | System and method for controlling concrete production A system is designed to measure concrete rheological properties which includes a concrete plant, a measuring unit and a mix changing unit. The measuring unit includes a surface in contact with a part of a mass of the concrete mix, a shearing unit for effe... | 09/07/1999 |
| 5872317 | Method for measuring wall shear stress due to fluid flow in piping systems A method and apparatus for measuring wall shear stress in pipe as a result of fluid flow therethrough employs a glass flow tube, magnetic particles of sufficiently small size such that the form drag force on the individual particles is orders of magnitude... | 02/16/1999 |
