| 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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| 07/26/1977 | US4038029 Limulus lysate turbidity test for pyrogens |
| 07/26/1977 | US4037974 Sample cell for spectrophotometers |
| 07/26/1977 | US4037973 Light sensitive device for measuring particles in a liquid |
| 07/26/1977 | US4037972 Measuring apparatus |
| 07/26/1977 | US4037971 Inspection tool |
| 07/26/1977 | US4037970 Optical analyzer for agricultural products |
| 07/26/1977 | US4037967 Apparatus for measuring the density of a liquid, utilizing the law of refraction |
| 07/26/1977 | US4037966 Method and device for examining pulp for the presence of shives |
| 07/26/1977 | US4037962 Apparatus for the spectral analysis of materials |
| 07/26/1977 | US4037961 System and apparatus for contour plotting the total luminescence spectrum of a sample |
| 07/26/1977 | US4037941 Inspection tool |
| 07/26/1977 | US4037724 Method of and apparatus for measuring defects in sealings |
| 07/26/1977 | US4037466 Method of regenerating a glycol-ether type inspection penetrant remover by solvent extraction |
| 07/19/1977 | US4036946 Immunofluorometric method for measuring minute quantities of antigens, antibodies and other substances |
| 07/19/1977 | US4036590 Method and apparatus for the automatic analysis of the concentration of an individual component of a fluid in a metal-depositing bath having several components |
| 07/19/1977 | US4036589 Determining the concentration of a biocide additive in a liquid |
| 07/19/1977 | US4035963 Method of forming dual mirrors |
| 07/12/1977 | USRE29304 Plasma light source for spectroscopic investigation |
| 07/12/1977 | US4035641 Liquid oxygen compatible biodegradable dye penetrant compositions and method of dye |
| 07/12/1977 | US4035156 Filter type rotor for multistation photometer |
| 07/12/1977 | US4035087 Light absorbance changes |
| 07/12/1977 | US4035086 Multi-channel analyzer for liquid chromatographic separations |
| 07/12/1977 | US4035085 Method and apparatus for comparing light reflectance of a sample against a standard |
| 07/12/1977 | US4035082 Method to test for chemically hardened glass lenses |
| 07/12/1977 | US4035080 Apparatus of spectroscopy of scattering light |
| 07/12/1977 | US4035079 Method of and device for investigating samples by a flame-free atom absorption process |
| 07/05/1977 | US4034219 Cleaning system for a continuous sensing oil-in-water monitor |
| 07/05/1977 | US4034190 Method and apparatus for remote salinity sensing |
| 07/05/1977 | US4033699 Heavy water, absorption spectrum |
| 07/05/1977 | US4033698 Apparatus for textile color analysis |
| 07/05/1977 | US4033330 Transcutaneous pH measuring instrument |
| 07/05/1977 | US4033181 Method for destructionless proofing of viscoelastic products |
| 06/28/1977 | US4032786 Method of using resonance atomic scattering of radiation to measure gaseous species |
| 06/28/1977 | US4032297 Pollution monitoring apparatus |
| 06/28/1977 | US4032236 Optical multiple-reflection arrangement |
| 06/28/1977 | US4032235 Apparatus for background absorption compensation in spectrophotometers |
| 06/21/1977 | US4031399 Fluorometer |
| 06/21/1977 | US4030837 Method and apparatus for automatically measuring distribution of reflectance of coals |
| 06/21/1977 | US4030836 Method for mapping surfaces with respect to ellipsometric parameters |
| 06/21/1977 | US4030835 Defect detection system |
| 06/21/1977 | US4030834 Dynamic multistation photometer |
| 06/21/1977 | US4030830 Process and apparatus for sensing defects on a smooth surface |
| 06/21/1977 | US4030827 Apparatus for the non-destructive examination of heterogeneous samples |
| 06/21/1977 | US4030806 Scanning optical system |
| 06/14/1977 | US4029420 Light reflectance instrument |
| 06/14/1977 | US4029419 Textile color analyzer calibration |
| 06/14/1977 | US4029418 Plant comparator |
| 06/14/1977 | US4029416 Sample-background-signal autocancellation in fluid-sample analyzers |
| 06/14/1977 | US4028932 Photo acoustic cell |
| 06/07/1977 | US4028728 Method of and video system for identifying different light-reflective surface areas on articles |
| 06/07/1977 | US4028553 Apparatus for controlling pharmaceutical ampoules |
| 06/07/1977 | US4028534 Automatic span circuit |
| 06/07/1977 | US4027982 Needle detector for circular knitting machines |
| 06/07/1977 | US4027979 Multiple chemistry analyzer |
| 06/07/1977 | US4027977 Method and apparatus for determining ratio of core radius to cladding radius in clad optical fibers |
| 06/07/1977 | US4027973 Detector apparatus for laser light scattering photometers |
| 06/07/1977 | US4027972 Gas analyzer method and apparatus |
| 05/31/1977 | US4027161 Minimizing wave interference effects on the measurement of thin films having specular surfaces using infrared radiation |
| 05/31/1977 | US4026656 Stone detector |
| 05/31/1977 | US4026414 Apparatus for testing tops of containers for damage |
| 05/24/1977 | US4025792 Filters for gas detectors |
| 05/24/1977 | US4025393 System for detecting growth in microorganisms |
| 05/24/1977 | US4025310 Continuous aqueous layer |
| 05/24/1977 | US4025202 Method and apparatus for inspecting the bottoms of hollow glass articles |
| 05/24/1977 | US4025201 Method and apparatus for video inspection of articles of manufacture by decussate paths of light |
| 05/24/1977 | US4025200 Soft and line laser |
| 05/17/1977 | US4024431 Resonance metal atom lamp |
| 05/17/1977 | US4024407 Device for measuring the dust content of a gas stream |
| 05/17/1977 | US4023930 Method and apparatus for determining the concentration of a gas or gases in a gas mixture by sensing the coloration undergone by reagent test paper, or the like, in response to exposure to such gas or gases |
| 05/17/1977 | US4023909 Null balance alphameter |
| 05/17/1977 | US4023905 Flash photolysis split beam spectrophotometer |
| 05/17/1977 | US4023503 Conveying installation |
| 05/10/1977 | US4022534 Reflectometer optical system |
| 05/10/1977 | US4022531 Monochromator |
| 05/10/1977 | US4022530 Device for atomizing a sample for flameless atomic absorption measurements |
| 05/10/1977 | US4022529 Feature extraction system for extracting a predetermined feature from a signal |
| 05/03/1977 | US4021713 Apparatus for sequential measurement of light transmitted through smoke |
| 05/03/1977 | US4021217 Refraction, monochromatic light |
| 05/03/1977 | US4021124 Vessels for the optical observation of liquids |
| 05/03/1977 | US4021123 Heat exchanger for analysis apparatus |
| 05/03/1977 | US4021122 Glass container inspection machine |
| 05/03/1977 | US4021121 Method and apparatus for measuring the distance of a discontinuity of a glass fiber from one end of the fiber |
| 05/03/1977 | US4021120 Method of measuring the turbidity of gas-containing liquid mediums with microorganisms |
| 05/03/1977 | US4020977 Continuous flow ratio monitor |
| 05/03/1977 | US4020949 Bottle inspection device |
| 04/26/1977 | US4020345 Detector for an infrared analyzer |
| 04/26/1977 | US4019372 Chromatographic detector system |
| 04/19/1977 | US4019060 Fluorescence locating system and method |
| 04/19/1977 | US4019056 Infrared laser detector employing a pressure controlled differential optoacoustic detector |
| 04/19/1977 | US4019017 Arc control circuit |
| 04/19/1977 | US4018562 Oxidation to nitric oxide, reaction with ozone |
| 04/19/1977 | US4018534 Aerosol average-density determining system |
| 04/19/1977 | US4018530 Fluorescence spectrometry employing excitation of bleaching intensity |
| 04/19/1977 | US4018513 Optical window used in device for monitoring clarity of a fluid |
| 04/12/1977 | US4017260 Oxidation, chemi-luminescence photoelectrically detected |
| 04/12/1977 | US4017193 Apparatus for measuring the transmittance or opacity of a gaseous medium carrying particulate matter through a conduit |
| 04/12/1977 | US4017192 Optical analysis of biomedical specimens |
| 04/12/1977 | US4017191 Two-beam photometer with rotatable graded interference filter |
| 04/12/1977 | US4017190 Blood leak detector comparing intensities of high absorption band and low absorption band of a single beam of light passing through a sample |
| 04/12/1977 | US4017186 Electro-optical method and system for in situ measurements of particulate mass density |