| Patents for G01N 31 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods (18,554) |
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| 08/03/1976 | US3972827 Silver detecting formulation |
| 08/03/1976 | US3972682 Pyrolysis furnace |
| 08/03/1976 | US3972680 Differentially kinetic determination of metal ions |
| 07/20/1976 | US3970430 Nitrogen oxide |
| 07/13/1976 | US3969626 Method and apparatus for detecting total reduced sulfur |
| 07/13/1976 | US3969076 Method for the analysis of ionic surfactants |
| 07/06/1976 | US3967933 Dual channel nitrogen oxides analyzer |
| 07/06/1976 | US3967928 Method for quantitatively analyzing substances containing elements other than carbon, hydrogen and oxygen and volatile organic compounds |
| 06/29/1976 | US3966412 Lewisite detection sampler and method |
| 06/29/1976 | US3966411 Analysis for nitrogen compounds by gas chromatography |
| 06/22/1976 | US3964871 Method and device for detecting glucose |
| 06/22/1976 | US3964869 Analytical apparatus for serial determination of nitrogen in samples by the Kjeldahl method |
| 06/22/1976 | US3964868 Organic carbon analyzer system |
| 06/08/1976 | US3962029 Method of controlling the amount of chemicals in liquids used within the cellulose industry and related industries |
| 06/08/1976 | US3961901 Alkylation acid end point detector |
| 06/01/1976 | US3960759 Liquid vesicant differentiating paint |
| 06/01/1976 | US3960494 Mercaptans |
| 05/25/1976 | US3958945 Sparging device |
| 05/25/1976 | US3958942 Analyzer for determination of double bonds |
| 05/25/1976 | US3958941 Apparatus for measuring content of organic carbon |
| 05/18/1976 | US3957441 Analysis of pollutants |
| 05/18/1976 | US3957438 Detecting fluorite in a solid rock sample |
| 05/18/1976 | US3957437 Method for detection of glycolates |
| 05/11/1976 | US3955927 In gasoline, colorimetric, iodine, 4-(2-pyridylazo)-resorcinol disodium salt |
| 05/11/1976 | US3955926 Process and quick-action reagent for the detection of narcotics |
| 05/11/1976 | US3955924 Method for the determination of total carbon in aqueous solutions |
| 05/04/1976 | US3954408 Radioactive tagging |
| 04/27/1976 | US3953171 Method and apparatus for rapidly evaluating the hydrocarbon production capacity of sediments, using small samples thereof |
| 04/20/1976 | US3951098 House plant water content indicator |
| 04/06/1976 | US3948969 4-Hydroxyphenyl-1,3-dioxo-2-indenylidene acetonitriles |
| 04/06/1976 | US3948733 New simplified protein hydrolysis apparatus |
| 04/06/1976 | US3948730 Measuring concentration of catalase enzyme |
| 04/06/1976 | US3948602 Analytical method of monitoring air for chloromethyl ether |
| 03/23/1976 | US3945801 Indicator providing continuous indication of the presence of a specific pollutant in air |
| 03/23/1976 | US3945800 Apparatus for combined protection against nuclear fallout and nuclear suffocation |
| 03/23/1976 | US3945799 Method for quantitatively determining oxygen content organic compounds |
| 03/23/1976 | US3945798 Formaldehyde test element and method of use |
| 03/23/1976 | US3945797 Process and apparatus for measuring the isotope content of substances labelled with 3 H or 3 H and 14 C isotopes |
| 03/16/1976 | US3944389 Detection of chloromethyl methyl ether or bis-chloro-methyl ether |
| 03/16/1976 | US3943751 Metal getter, thermal conductivity |
| 03/09/1976 | US3942467 Time temperature indicator |
| 03/02/1976 | US3941567 Device for the analysis of microscopic objects by laser pyrolysis and chromatography in the gaseous phase |
| 02/24/1976 | US3940250 Testing using luminescent reaction |
| 02/17/1976 | US3939226 Sequestrant, fire retardant |
| 02/10/1976 | US3937613 Device for the determination of chlorine in the water of swimming pools |
| 02/03/1976 | US3935944 Diagnostic display package |
| 01/27/1976 | US3934991 Silver carbonate |
| 01/27/1976 | US3934976 Colorimetric |
| 01/20/1976 | US3933997 Radioactivity, silane coupling agent |
| 01/20/1976 | US3933429 Method and apparatus for determining the total oxygen demand of combustible materials in aqueous dispersion |
| 01/20/1976 | US3933165 Apparatus for octane monitoring |
| 01/13/1976 | US3932134 Time-temperature integrating indicator device |
| 01/13/1976 | US3932131 Photometric |
| 01/06/1976 | US3930798 Determining inorganic and organic carbon content, chemical oxygen demand |