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Class Information
Number: 250/344
Name: Radiant energy > Invisible radiant energy responsive electric signalling > Infrared responsive > With means to transmission-test contained fluent material > Plural series signalling means
Description: Subject matter having two or more signalling means spaced along a single path of radiation from the source.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7244939 |
Gas sensor |
Jul. 17, 2007 |
| 7213444 |
Optoacoustic gas sensor |
May. 8, 2007 |
| 7149677 |
Geometric model comparator and method |
Dec. 12, 2006 |
| 7012692 |
Photothermal conversion spectroscopic analysis method, and photothermal conversion spectroscopic analysis apparatus for carrying out the method |
Mar. 14, 2006 |
| 6452182 |
Photometer with non-dispersive infraded absorption spectroscopy (NDIR) for measuring several constituents |
Sep. 17, 2002 |
| 6392234 |
Infrared optical gas sensor |
May. 21, 2002 |
| 6320192 |
Detector for use in infrared analyzer, flow detector and manufacturing method thereof |
Nov. 20, 2001 |
| 6275747 |
Microcomputer and its access speed control method |
Aug. 14, 2001 |
| 6222190 |
Photo acoustic infrared (IR) detector |
Apr. 24, 2001 |
| 6166383 |
Non-dispersive infrared gas analyzer |
Dec. 26, 2000 |
| 6040579 |
Thermoelectric sensor |
Mar. 21, 2000 |
| 5894128 |
Infrared type gas analyzer |
Apr. 13, 1999 |
| 5793043 |
Method and apparatus for determining the alcohol concentration in a gas mixture |
Aug. 11, 1998 |
| 5739538 |
Pneumatic infrared gas detector |
Apr. 14, 1998 |
| 5559333 |
Apparatus of non-dispersive infrared analyzer |
Sep. 24, 1996 |
| 5464980 |
Flame sensors and methods of sensing flame |
Nov. 7, 1995 |
| 5459075 |
Apparatus for measuring the total content of organic carbon and nitrogen in water |
Oct. 17, 1995 |
| 5387971 |
Method and apparatus for measuring concentration of a solution using pathlength complementally modulated cells |
Feb. 7, 1995 |
| 5362967 |
Pneumatic infrared ray detector for use in gas analyzer |
Nov. 8, 1994 |
| 5357113 |
Infrared gas mixture analyzer |
Oct. 18, 1994 |
| 5340542 |
Apparatus for the measurement of the total content of organic carbon and nitrogen in water |
Aug. 23, 1994 |
| 5321266 |
Pneumatic two-layer detector for NDIR gas analyzers |
Jun. 14, 1994 |
| 5292666 |
Method for the measurement of the total content of organic carbon and nitrogen in water |
Mar. 8, 1994 |
| 5124553 |
Optical measurement method using stacked germanium and silicone detectors |
Jun. 23, 1992 |
| 5077469 |
Calibrating a nondispersive infrared gas analyzer |
Dec. 31, 1991 |
| 5055688 |
Multicomponent infrared gas analyzer |
Oct. 8, 1991 |
| 4937448 |
Self-normalizing single-beam laser spectrometer |
Jun. 26, 1990 |
| 4849637 |
Method and apparatus for continuously measuring the concentration of a gas component |
Jul. 18, 1989 |
| 4742229 |
Pneumatic detector for nondispersive infrared gas analyzers |
May. 3, 1988 |
| 4714832 |
Photometer |
Dec. 22, 1987 |
| 4700073 |
Photometer |
Oct. 13, 1987 |
| 4692622 |
Infrared analyzer |
Sep. 8, 1987 |
| 4514635 |
Non-dispersive infrared analyzer |
Apr. 30, 1985 |
| 4393304 |
Gas analyzer of the fluid modulation type |
Jul. 12, 1983 |
| RE31246 |
Determination of the alcohol content of blood |
May. 17, 1983 |
| 4373137 |
Radiation detection and receiving in nondispersive infrared gas analyzer |
Feb. 8, 1983 |
| 4336453 |
Non-dispersion type infrared analyzer for simultaneously determining plural components |
Jun. 22, 1982 |
| 4306153 |
Nondispersive infrared gas analyzer |
Dec. 15, 1981 |
| 4277179 |
Resonant subcavity differential spectrophone |
Jul. 7, 1981 |
| 4180732 |
Nondispersive infrared gas analyzer |
Dec. 25, 1979 |
| 4110619 |
Method of compensating for carrier-gas-composition dependence due to the collision-broadening effect in non-dispersive infrared photometers having a detector comprised of two absorption chambe |
Aug. 29, 1978 |
| 4103163 |
Infrared gas analyzing apparatus |
Jul. 25, 1978 |
| 4067653 |
Differential optoacoustic absorption detector |
Jan. 10, 1978 |
| 4058725 |
Infrared absorption spectrometer employing a dual optoacoustic detector |
Nov. 15, 1977 |
| 4057724 |
Determination of the alcohol content of blood |
Nov. 8, 1977 |
| 4048499 |
Infrared absorption spectroscopy of liquids employing a thermal detector |
Sep. 13, 1977 |
| 4044257 |
Retention time chromatograph employing an IR absorption spectrographic detector |
Aug. 23, 1977 |
| 4019056 |
Infrared laser detector employing a pressure controlled differential optoacoustic detector |
Apr. 19, 1977 |
| 4008394 |
Gas analyzing |
Feb. 15, 1977 |
| 3969626 |
Method and apparatus for detecting total reduced sulfur |
Jul. 13, 1976 |
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