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| Number | Title | Issue Date |
| 4020005 | Gelled reagent materials Reagents can be provided in more convenient and readily-utilizable forms by converting the basic desired reagent material into a shapeable solid using gelation techniques (i.e., a non-crystalizing solidification process) for the fluids that are carriers a... | 04/26/1977 |
| 3992109 | Cyclic colorimetry method and apparatus A process of and apparatus for colorimetry, whereby an indicator is added cyclically to a fluid stream to indicate the presence or absence of a condition in the stream. The presence of the condition may be indicated by the formation of a precipitate, a ch... | 11/16/1976 |
| 3992149 | Colorimetric method for the analysis of residual anionic or cationic surfactants A method suitable for the rapid colorimetric testing of raw water supplies, domestic sewage or industrial wastes for determining the residual presence and concentration of either anionic or cationic surfactants. An appropriate dye will react with ionic su... | 11/16/1976 |
| 3992150 | Method and equipment for speedy preparation of test liquids A cuvet is prepared for test analysis of a substance by placing a predetermined volume of a reagent liquid in a cuvet and then using a pipette or capillary tube for taking up a predetermined volume of the test substance by capillary action. Then the charg... | 11/16/1976 |
| 3992409 | 1-Alkanesulfonyloxyalkyl-2-alkyl-3-diphenylmethylenepyrrolidines This invention relates to novel 1-alkanesulfonyloxyalkyl-2-alkyl-3-diphenylmethylenepyrrolidines, their acid addition salts and preparation thereof, having anticolinergic activity.... | 11/16/1976 |
| 3975158 | Analysis of gentian violet residue in tissue A process for the analysis of gentian violet in animal or poultry tissue, animal or poultry manure, animal or poultry feed, or eggs. The gentian violet is quantitatively determined.... | 08/17/1976 |
| 3973910 | Method of measuring the N-nitrosoamine content of a sample The N-nitrosoamine content of a sample is measured by breaking the N--NO bond in the N-nitrosoamine molecule so as to liberate nitric oxide and thereafter measuring the amount of nitric oxide liberated.... | 08/10/1976 |
| 3972680 | Differentially kinetic determination of metal ions Differentially kinetic determination of metal ions using metal complexes of trans-1,2-diaminocyclohexane-N,N,N',N'-tetra-acetate.... | 08/03/1976 |
| 3971630 | Apparatus and method for batch-type analysis of liquid samples Apparatus and method for photometrically analyzing a constituent of interest in body or other fluids and well suited for kinetic determinations which are temperature-and-time dependent. There is provided a sample holder holding a cuvette supporting a liqu... | 07/27/1976 |
| 3970427 | Process for reducing sticking of blood cells to glass in blood testing procedures Blood Cells are suspended in a physiological saline solution modified by the addition of a small amount of gelatin. The presence of gelatin serves to reduce attractive forces between the blood cells and glass surfaces in testing procedures.... | 07/20/1976 |
| 3951602 | Spectrophotometric formaldehyde-copper monitor In an apparatus comprising a spectrophotometer, an inspection cell, and an electroless copper plating bath containing copper ions and formaldehyde for measuring the copper ion concentration of the bath spectrophotometrically, the improvement which compris... | 04/20/1976 |
| 3941563 | Method and apparatus for detecting hexavalent chromium Disclosed herein is a process and apparatus for quantitatively determining the amount of hexavalent chromium (CR.sup.+6) in a process stream by comparing the optical density of the process stream with a reference sample produced by reducing Cr | 03/02/1976 |
| 3936271 | Method for protein analysis A dye-binding method for the rapid and accurate colorimetric determination of the percentage of protein in meat. The method is accurate irrespective of the degree of denaturization of the protein or coarseness of the meat to be analyzed.... | 02/03/1976 |
