| Patents for G01N 21 - Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light (181,396) |
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| 04/12/1990 | CA2000578A1 Method and apparatus for providing quality assurance and calibration assurance in a spectrophotometer |
| 04/11/1990 | EP0363265A1 Automatic colorimetric sample analyser, particularly for blood analyses |
| 04/11/1990 | EP0362679A2 Inside surface inspection system and method therefor |
| 04/11/1990 | EP0362577A2 Process for optically bringing an element analysis system and a laser in touch with liquid metal in a crucible |
| 04/11/1990 | EP0362435A1 Fluorescent tracers - chemical treatment monitors |
| 04/11/1990 | EP0362304A1 Chemical sensors employing catalytic antibodies. |
| 04/11/1990 | CN2055936U Turbidimeter with fully autornatic measuring range |
| 04/11/1990 | CN2055935U Slit micro-absorption cell in spectrophotometer |
| 04/10/1990 | US4916645 Continuous monochrometer drift compensation of a spectral monochromator |
| 04/10/1990 | US4916629 Method for determination of pith location relative to lumber surfaces |
| 04/10/1990 | US4916406 Automatic gain control circuit |
| 04/10/1990 | US4916317 Method and a device for detecting changes in a surface state and for monitoring the surface state |
| 04/10/1990 | US4916309 Appliance for converting reflectance measuring instrument into a transmittance measuring instrument |
| 04/10/1990 | US4916078 Superimposing force on fluid flow |
| 04/10/1990 | US4915911 Accurate enzyme-linked immunosorbent assay |
| 04/10/1990 | US4915501 Device for measuring the light scattering of biological cells in flow cytophotometers |
| 04/10/1990 | US4915237 Comprehensive container inspection system |
| 04/10/1990 | EP0276304A4 Method and apparatus for detecting incongruities, such as air bubbles, in fluid material. |
| 04/10/1990 | EP0265513A4 Method and apparatus for measuring cyanide. |
| 04/10/1990 | EP0253872A4 Infrared gas analyzer with automatic zero adjustment. |
| 04/10/1990 | CA1267547A1 Breath tester |
| 04/10/1990 | CA1267546A2 Infra-red spectrophotometric apparatus |
| 04/10/1990 | CA1267521A1 Amine charge control process in a natural gas purification tower |
| 04/07/1990 | CA2000305A1 Anesthetic agent identification analyzer and contamination detector |
| 04/05/1990 | WO1990003567A1 METHOD AND DEVICE FOR DETERMINING THE pH AND THE CELL CONCENTRATION IN A CELL CULTURE MEDIUM |
| 04/05/1990 | WO1990003566A1 Reading device for a microtest plate |
| 04/05/1990 | WO1990003565A1 Sensor and method for measuring alcohol concentration in an alcohol-gasoline mixture |
| 04/05/1990 | DE3925312A1 Microscopic imaging appts. for thermal and thermo-elastic structure - has piezoelectrical flexural transducer detecting mechanical vibrations caused by light variations |
| 04/05/1990 | DE3924839A1 Electrothermal atomisation for atom absorption etc. spectroscopy - using thermal expansion reduction separator in inner protective gas flow |
| 04/05/1990 | DE3922336A1 Microscopic imaging of thermal and thermo-elastic object structure - using illumination light power regulation to maintain power absorbed by object constant |
| 04/05/1990 | DE3833598A1 Photometer |
| 04/05/1990 | DE3833533A1 Device for the colorimetric determination of substances |
| 04/05/1990 | DE3833303A1 Photometer |
| 04/05/1990 | DE3833104A1 Beam-guiding element |
| 04/05/1990 | DE3833064A1 Leseeinheit fuer eine mikrotestplatte Read unit for a micro-plate test |
| 04/04/1990 | EP0362036A2 System and process for detecting properties of travelling sheets in the cross direction |
| 04/04/1990 | EP0361999A1 Probe for optical sensor |
| 04/04/1990 | EP0361904A2 Turbidity meter |
| 04/04/1990 | EP0361770A2 Particle measuring method and apparatus |
| 04/04/1990 | EP0361625A2 Method and apparatus for examining food products by means of irradiation |
| 04/04/1990 | EP0361430A2 Sensing of material of construction and color of containers |
| 04/04/1990 | EP0360901A1 Method and device for the sampling and analysis of hydrocarbons |
| 04/04/1990 | EP0360847A1 Curcumin in the detection and warning of cyanide adulterated food products |
| 04/04/1990 | CN1040980A Method and compositions providing enhanced chemiluminescence from 1,2-dioxetanes |
| 04/03/1990 | US4914719 Multiple component gas analyzer |
| 04/03/1990 | US4914310 Method and apparatus for measuring particle concentration in a suspension |
| 04/03/1990 | US4914309 Discriminating type flaw detector for light-transmitting plate materials |
| 04/03/1990 | US4914308 Web defect scanning apparatus with incandescent illumination means |
| 04/03/1990 | US4914297 Infrared spectrometer interface for thermogravimetric analysis |
| 04/03/1990 | US4914289 Article inspection system for analyzing end and adjacent sides |
| 04/03/1990 | US4914285 Control means for web scanning apparatus |
| 04/03/1990 | US4913881 Dosimeter |
| 04/03/1990 | US4913648 Quartz burner for use in an atomic absorption spectrometer for the analysis of organometal compounds via hydride derivatization |
| 04/03/1990 | US4913519 Optical sensor for the detection of ice formation and other chemical species |
| 04/03/1990 | US4913150 Method and apparatus for the automatic calibration of signals employed in oximetry |
| 04/03/1990 | CA1267464A1 Method and apparatus for detecting incongruities, such as air bubbles, in fluid material |
| 04/03/1990 | CA1267299A1 Laser retroreflectivity measuring apparatus and method |
| 04/03/1990 | CA1267298A1 Infra-red spectrophotometric apparatus |
| 03/29/1990 | DE3832185A1 Humidity (moisture) sensor and measuring arrangement for the measurement of humidity |
| 03/28/1990 | EP0360738A1 Method and apparatus for calculating paints formulae |
| 03/28/1990 | EP0360484A2 Densitometer for measuring specular reflectivity |
| 03/28/1990 | EP0360232A2 A surface inspection apparatus |
| 03/28/1990 | EP0360150A2 Device for determining the effective superficial roughness of polished optical samples by measurement of integral light scatterings |
| 03/28/1990 | EP0359838A1 Pattern recognition device |
| 03/27/1990 | US4912529 Apparatus and method to compensate for refraction of radiation |
| 03/27/1990 | US4912487 Laser scanner using focusing acousto-optic device |
| 03/27/1990 | US4912332 Non-destructive methods for detecting organic deposits and removing them |
| 03/27/1990 | US4912319 Detector device for mixing ratio for gasoline and alcohol or the like |
| 03/27/1990 | US4912318 Inspection equipment for small bottles |
| 03/27/1990 | US4912059 Phase sensitive differential polarimetry technique and apparatus |
| 03/27/1990 | US4911028 Apparatus and method for carrying out measurements on a bobbin of sheet material |
| 03/27/1990 | US4911025 Method and apparatus for preparing a suspension for measurement |
| 03/27/1990 | CA1267219A1 Automatic inspection device |
| 03/27/1990 | CA1266998A1 Dielectric waveguide sensors and their use in immunoassays |
| 03/27/1990 | CA1266997A1 Instrument for measuring the photosynthetic activities of plants |
| 03/27/1990 | CA1266996A1 Methods and apparatus for rapidly determining parameters of a sample medium |
| 03/22/1990 | WO1990002937A1 Inspection of container finish |
| 03/22/1990 | WO1990002936A1 Transmissometer |
| 03/22/1990 | WO1990002935A1 Method for the detection of a gas using photoacoustic spectroscopy |
| 03/22/1990 | WO1990002742A1 Purification of stable water-soluble dioxetanes |
| 03/22/1990 | WO1990001692A3 Electro-optical measuring instruments |
| 03/22/1990 | EP0286653A4 Method and system for determining free fatty acid content. |
| 03/21/1990 | EP0359660A1 Optical control of micro piercings in turbine blades |
| 03/21/1990 | EP0359550A2 Analytic reader device |
| 03/21/1990 | EP0359213A2 Filter for optical beams |
| 03/21/1990 | EP0359206A1 Liver function testing apparatus |
| 03/21/1990 | EP0359167A2 Refractometer with an index-dependent aperture division |
| 03/21/1990 | EP0358982A2 Process and apparatus for the automated and contactless inspection of the surfaces of cylindrical parts |
| 03/21/1990 | EP0358818A1 Reflective photometry instrument |
| 03/21/1990 | EP0358809A1 Spectrophotometer for monitoring a living organism |
| 03/21/1990 | EP0358661A1 Method and system for determining surface profile information. |
| 03/21/1990 | EP0357679A4 Fiber optic which is an inherent chemical sensor. |
| 03/21/1990 | CN2054905U Urine self-detecting case |
| 03/21/1990 | CN1040677A Image processing apparatus for determining unqualified products |
| 03/20/1990 | US4910406 Method for detecting the presence of contaminants in a reusable plastic food or beverage container |
| 03/20/1990 | US4910404 CT computed tomograph |
| 03/20/1990 | US4910403 Sampling flow cell with diamond window |
| 03/20/1990 | US4910402 Apparatus and method for measuring a property of a liquid |
| 03/20/1990 | US4909990 Analyzing fluid sample |
| 03/20/1990 | US4909631 Method for film thickness and refractive index determination |