| 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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| 10/23/1991 | EP0453190A2 Method of analysing for carbon monoxide in a gas |
| 10/23/1991 | EP0452740A1 Test device to analyse fluids |
| 10/23/1991 | CN1055603A Determination of nitrite radical ions |
| 10/23/1991 | CN1014465B Exhaust gas detection tube for gasoline-vehicle and its mfg. method |
| 10/22/1991 | US5059539 Test for catalyst activity |
| 10/18/1991 | CA2039537A1 Method of analyzing carbon monoxide in gas |
| 10/16/1991 | EP0451981A2 Disposable reagent unit |
| 10/16/1991 | EP0451848A2 Immunoassay element and process for immunoassay |
| 10/16/1991 | EP0451609A2 Vapor phase photodegradation device |
| 10/16/1991 | EP0451510A2 Display of Multiple variable relationships |
| 10/16/1991 | EP0433382A4 Method and apparatus for chemical species determination |
| 10/15/1991 | WO1991016626A1 Slides for use in the analysis of liquids |
| 10/15/1991 | US5057435 Including dimethyl sulfoxide and 8-hydroxyquinoline in reagent mixture |
| 10/15/1991 | US5057434 Multifunctional time-temperature indicator |
| 10/15/1991 | US5057433 Indicator elements for autoclaves |
| 10/15/1991 | US5057280 Test tube, photoelectric sampling and optical imaging |
| 10/15/1991 | US5057277 Filler, radiative material and modifier |
| 10/15/1991 | US5057276 Process for the preparation of reagent layers containing hydrophobic reagents |
| 10/15/1991 | CA1290750C Chromogenic cryptahemispherands and their use in detecting electrolytes in an aqueous test sample |
| 10/15/1991 | CA1290749C Compounds, reagents and procedures for determining cations |
| 10/15/1991 | CA1290663C Analytical element and method for theophylline determination usingbuffer in spreading zone |
| 10/15/1991 | CA1290662C Analytical element and method for theophylline determination having increased alkaline phosphatase isoenzyme |
| 10/15/1991 | CA1290661C Stable composition for the determination of peroxidatively active substances |
| 10/15/1991 | CA1290660C Analytical composition, element and method for the determination of hydrogen peroxide |
| 10/15/1991 | CA1290659C Analytical element and method for determination of magnesium ions |
| 10/15/1991 | CA1290658C Transparent test strip system |
| 10/12/1991 | WO1991015758A1 Methods and apparatus allowing sequential chemical reactions |
| 10/12/1991 | CA2079005A1 Methods and apparatus allowing sequential chemical reactions |
| 10/11/1991 | WO1991015761A1 Assay for compounds which are, or can be converted to, aldehydes |
| 10/11/1991 | CA2080374A1 Assay for compounds which are, or can be converted to, aldehydes |
| 10/09/1991 | EP0450519A2 Ionic component sensor and method for making and using same |
| 10/09/1991 | EP0450292A2 Procedure and apparatus for continuous measurement of the ammonia concentration of gases in the ppm range |
| 10/09/1991 | CN1055240A Method for mfg. available chlorine indicator paper |
| 10/08/1991 | US5055413 Method of measuring impurities in oxide films using a meltable sample collection stick |
| 10/08/1991 | US5055410 Colorimetric analysis;detecting reaction product of indicator and contaminants |
| 10/08/1991 | US5055409 Method for reducing interferences in the analysis of substances which form volatile hydrides |
| 10/08/1991 | US5055407 Composition and method of assaying aqueous liquids for specific gravity |
| 10/08/1991 | CA1290227C Test device and method of determining concentration of a sample component |
| 10/06/1991 | CA2039882A1 Test carrier for the analysis of fluids |
| 10/02/1991 | EP0449798A2 Method for quality control of packaged organic substances and packing material for implementing the method |
| 10/02/1991 | EP0449295A1 Novel quinoxalinone derivative |
| 10/02/1991 | EP0449017A1 Use of polymer blend films as supports for diagnosis test strips |
| 10/01/1991 | US5053623 Photometric analyzer for differential total reduced sulfur measurement by comparison with sample gas |
| 10/01/1991 | US5053339 Color changing device for monitoring shelf-life of perishable products |
| 10/01/1991 | CA2039239A1 Device and process for the continuous measurement of the ammonia concentration in gases in the p.p.m. range |
| 10/01/1991 | CA1289872C Reversible immobilization of assay reagents in a multizone test device |
| 09/27/1991 | CA2036435A1 Reagent unit |
| 09/25/1991 | EP0448052A2 Method for making a gas sensing element |
| 09/25/1991 | EP0447949A1 Optical oxygen sensor |
| 09/25/1991 | EP0447888A2 Device for wiping a reagent strip |
| 09/24/1991 | CA1289471C Dry test strip for devices using oxygen demanding detection system |
| 09/24/1991 | CA1289443C Test aids and method for the preparation thereof |
| 09/23/1991 | CA2038167A1 Use of polymer blend films as supports for diagnostic test strips |
| 09/17/1991 | US5049666 Water soluble TMC-crown formazans for detecting lithium |
| 09/11/1991 | EP0445621A2 Method and agent for the colorimetric determination of nitrate ions |
| 09/11/1991 | EP0445412A1 Naphthotriazolium salts |
| 09/11/1991 | EP0445111A1 Carbon dioxide detection |
| 09/11/1991 | CN2084620U Portable medicine identifying box |
| 09/11/1991 | CN2084619U 自动滴定分析装置 Automatic titration analysis device |
| 09/11/1991 | CN1054487A In-line measurer of oxygen dissolved in geothermic water |
| 09/10/1991 | US5047351 Optical end-point type analytical method |
| 09/10/1991 | US5047100 Curcumin in the detection and warning of cyanide adulterated food products |
| 09/10/1991 | US5046507 Tear production measuring sheet and package therefor |
| 09/10/1991 | CA1288766C Reducible compounds and analytical compositions, elements and methods utilizing same |
| 09/08/1991 | CA2036893A1 Naphthotriazolium salts |
| 09/05/1991 | WO1991013362A1 Method and apparatus for the determination of dissolved carbon in water |
| 09/04/1991 | EP0444273A1 Composition, device and method of assaying for a peroxidatively active substance |
| 09/04/1991 | EP0444263A1 Improved composition, device and method of assaying for peroxidatively active substances |
| 09/03/1991 | US5045477 Analytical methods utilizing reducible components |
| 09/03/1991 | US5045284 Flow cell for precipitation titration flow injection analysis |
| 09/03/1991 | US5045283 Moving boundary device for monitoring shelf-life of a perishable product |
| 09/03/1991 | US5045282 Optical fiber sensing device for analysis |
| 09/03/1991 | US5044860 Analysis of organic material |
| 09/03/1991 | CA1288323C Test-tube throttle |
| 08/29/1991 | WO1991012904A1 Method and device for moving molecules by the application of a plurality of electrical fields |
| 08/29/1991 | DE4038835A1 Pyridine-free Karl-Fischer titration agent for determn. of water - with solvent mixt. of sodium acetate as base, sulphur di:oxide and stabiliser |
| 08/29/1991 | DE4011309C1 Photographic support material heavy metal impurity determn. - by coating with hydrophobic polyvinyl alcohol bonding agent, wetting with chemical indicator soln. and drying |
| 08/29/1991 | CA2075969A1 Method and device for moving molecules by the application of a plurality of electrical fields |
| 08/28/1991 | EP0443161A2 Test carrier for analysis of a sample fluid |
| 08/27/1991 | CA1288030C Reactor analysis system |
| 08/22/1991 | WO1991012525A1 Glucose measurement control reagent |
| 08/21/1991 | EP0442776A1 Reagent and method for its use in the automatic counting of basophilic leucocytes in blood with devices which measure the variation in resistivity |
| 08/21/1991 | EP0442250A2 Control method with redox-potential |
| 08/21/1991 | EP0442232A1 Apparatus for the analysis of liquid samples |
| 08/21/1991 | EP0442138A1 Method and apparatus for continuously monitoring incineration flue gases |
| 08/21/1991 | EP0441875A1 Enhanced electrochemiluminescence. |
| 08/20/1991 | US5041265 Hydrogen gas analyzer with improved delivery system |
| 08/14/1991 | EP0440815A1 Method of and device for measuring extremely small quantity of oxygen in gas |
| 08/13/1991 | US5039489 Apparatus for catalyst analysis |
| 08/13/1991 | US5039439 Optically indicating surface de-icing fluids |
| 08/13/1991 | CA1287559C Method and apparatus for multiple end point in flow injection titrimetry analysis |
| 08/09/1991 | WO1991012527A1 Fluid detection device |
| 08/09/1991 | CA2075054A1 Fluid detection device |
| 08/07/1991 | EP0439604A1 Porous polymer film calcium ion chemical sensor and method of using the same |
| 08/06/1991 | CA1287290C Activatable time-temperature indicator |
| 08/05/1991 | WO1999039197A1 Substrate for packaging perishable goods or for application onto same and method for determining the quality of said goods |
| 07/31/1991 | EP0439318A2 Doped sol-gel glasses for obtaining chemical interactions |
| 07/31/1991 | EP0438414A1 A method and device for measuring formaldehyde emission from surfaces |
| 07/31/1991 | CA2025803A1 Composition, device and method of assay for peroxidatively active substances |
| 07/31/1991 | CA2025802A1 Composition, device and method of assaying for a peroxidatively active substance |