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| Number | Title | Issue Date |
| 8163182 | Compartmentalized field flow fractionation A field flow fractionator to separate particles contained within an injected sample aliquot is described. As required, said fractionator may be used to capture, for subsequent removal, specific predefined classes of such particles. Based upon the cross flow or asymm... | 04/24/2012 |
| 7982875 | Method and apparatus for measuring the scattered light signals from a liquid sample A sample cell for making light scattering measurements, incorporating an exterior surface acting as both a lateral and vertical lens, is described. This unique structure permits greatly improved measurement of the light scattered by molecules and particles suspended... | 07/19/2011 |
| 7911594 | Method to derive physical properties of a sample after correcting the effects of interdetector band broadening Chromatographic separations are often characterized by multiple detectors through which the sample flows serially. As the sample flows between detectors, it becomes progressively diluted due to mixing and diffusion. This phenomenon is traditionally called interdetec... | 03/22/2011 |
| 7813882 | Method for determining average properties of molecules in solution A new method is presented for measuring the molecular properties of an unfractionated solution of macromolecules. Sample aliquots spanning a range of concentrations are injected sequentially into a stream of solution and flow towards the detectors. Each aliquot prod... | 10/12/2010 |
| 7710571 | Optical membrane formation system and method The invention relates to a spectroscopy system and improved membrane formation techniques. The system has at least one light source operable to generate a source beam and a prism having a rear surface. A support block is disposed on the rear surface of the prism. Th... | 05/04/2010 |
| 7420683 | Optical membrane formation system and method A spectroscopy system has at least one light source operable to generate a source beam and a prism having a rear surface. A support block is disposed on the rear surface of the prism. The support block is formed with at least one sample well having a center and defi... | 09/02/2008 |
| 7386427 | Method for correcting the effects of interdetector band broadening Chromatographic separations are often characterized by multiple detectors through which the sample flows serially. As the sample flows between detectors, it becomes progressively diluted due to mixing and diffusion. This phenomenon is traditionally called interdetec... | 06/10/2008 |
| 7331218 | Capillary bridge viscometer and method for measuring specific viscosity A bridge viscometer for measuring specific viscosity, ηsp(t), includes four capillaries, a delay volume, and a pressure transducer. The pressure transducer generates a signal indicative of a pressure differential, Δp(t), as a sample is introduced into t... | 02/19/2008 |
| 7294513 | Method and apparatus for characterizing solutions of small particles A method and apparatus is described by which means molecules in suspension may be characterized in terms of the size and mass distributions present. As a sample solution is separated by centrifugal means, it is illuminated at a particular radial distance from the ax... | 11/13/2007 |
| 7283221 | Refractometer cell for both absolute and differential refractive index measurement of fluids An improved cell for a walk-off refractometer is disclosed that permits measurement of the differential refractive index, DRI, between a sample fluid and a reference fluid. In addition, the new cell design permits the measurement of the refractive index, RI, of a fl... | 10/16/2007 |
| 7224462 | Beam shifting surface plasmon resonance system and method The invention relates to a surface plasmon resonance system method. The system has at least one light source operable to generate a source beam, a prism having a rear surface at least partially coated with a metallic coating and optionally a dielectric layer. At lea... | 05/29/2007 |
| 7213439 | Automatic bridge balancing means and method for a capillary bridge viscometer A thermally controlled stage is connected within one arm of a bridge of a capillary bridge viscometer so that the bridge can be balanced in situ to provide accurate measurement signals. The thermally controlled stage includes a tuning capillary tubing portion that i... | 05/08/2007 |
| 7027138 | Enhanced sensitivity differential refractometer incorporating a photodetector array An improved differential refractometer incorporating a photodetector array is disclosed. Using a multi-element photo array provides the basis for measurement of differential refractive index values with a heretofore unattainable combination of sensitivity of measure... | 04/11/2006 |
| 6975392 | Enhanced sensitivity differential refractometer measurement cell A sensitivity-enhanced flow cell to be used in the determination of the differential refractive index increment of a sample fluid relative to a reference fluid is disclosed. The invention permits the use of smaller sample amounts without sacrificing overall sensitiv... | 12/13/2005 |
| 6778912 | Device and method to locate, detect, and remove precipitated aerosol particles A method and apparatus are described by which previously identified aerosol particles that may have precipitated onto surfaces and/or into specific physical regions are detected, removed from said regions, and stored for later examination or destruction. The method ... | 08/17/2004 |
| 6774994 | Method and apparatus for determining absolute number densities of particles in suspension A method for determining absolute number densities of particles in a solution is disclosed based on a light scattering method. A light scattering photometer is calibrated to produce the Rayleigh ratio at each angle measured with respect to light scattered per unit i... | 08/10/2004 |
| 5475235 | Control of laser light power output for use in light scattering instruments by inducing mode hopping and averaging result The incorporation of certain classes of solid state lasers into light scattering instrumentation is desirable because of their compact structure. However, mode hopping often causes the output power produced by such lasers to be unstable. The frequency of ... | 12/12/1995 |
