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| Number | Title | Issue Date |
| 5017497 | Particle discriminator and method Method and apparatus for analyzing particles based on different depolarizing structure associated with the different particle types. Cells in a flow cytometer are illuminated with a linearly polarized light, producing scattered depolarized light whose int... | 05/21/1991 |
| 4931256 | Apparatus for dilution and measurement in automated immunoassay techniques Apparatus are provided which automatically add diluent/quench reagent in such a manner as to enable adequate mixing as well as a short period for further mixing in automated immunoassay techniques. The probes for adding the diluent/quench reagents are off... | 06/05/1990 |
| 4816418 | Method and apparatus for performing automated, multi-sequential immunoassays Methods and apparatus useful in automated performance of immunoassays, in some preferred embodiments, relying upon the sandwich immunoassay technique, are described. Each rack of reaction tubes is uniquely identified by an optical identifier disc which is... | 03/28/1989 |
| 4803050 | Method and apparatus for liquid addition and aspiration in automated immunoassay techniques Apparatus and method for adding liquid to, aspirating liquid from, a rack of reaction tubes wherein a rack and carriage-dependent probes are made to move relative each other in the horizontal and vertical planes. The method calls for performing the first ... | 02/07/1989 |
| 4751052 | Tube alignment apparatus An apparatus for centering the open end of tubes prior to the insertion of a probe is described. The tube aligning means has a frustoconical inner surface to gather the tube mouth held loosely in a tube rack. The tube is centered relative to the probe. Th... | 06/14/1988 |
| 4745071 | Method for the volumetric differentiation of blood cells types Improved reagents and methods for obtaining distinct volumetric differentiation of platelets, erythocytes and certain leukocyute subpopulations are disclosed. 1,3-dimethylurea is disclosed as a cell stabilizing agent for use in the blood diluent reagent. ... | 05/17/1988 |
| 4730631 | Probe wash station For use with an apparatus for performing biological fluid assays, the apparatus having a probe assembly that includes a tubular probe, a probe wash station for washing the tubular probe with a washing fluid. The probe wash station comprises a probe washin... | 03/15/1988 |
| 4726237 | Fluid metering apparatus and method A transfer valve system, method and apparatus are disclosed having a three element valve with a central element sandwiched between front and rear outer elements. Between an aspiration and a discharge position the front and rear outer elements are moved in... | 02/23/1988 |
| 4713218 | Tube trap apparatus A tube restraining apparatus is described for centering the mouth of a loosely held test tube prior to the insertion of a probe. The apparatus is automatically activated by a motor driven carriage and the cooperation of the probe and the bail. The mouth o... | 12/15/1987 |
| 4710021 | Particulate matter analyzing apparatus and method A method and apparatus for jetting a measured volume of a suspension of particulates such as blood cells or colloids into a single fluid-primed incompletely partitioned transducer chamber in such a way that the dynamic relationship between the priming liq... | 12/01/1987 |
| 4622468 | Fluorescence intensity compensation method and device Variations in the intensity of a light source and the sensitivity of a fluorescence detector photo-multiplier tube are simultaneously compensated by measuring the intensity (ILS1) of the light source at the sample excitation frequency with a si... | 11/11/1986 |
