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Browse by Category: Main > Optical & Optics
Class Information
Number: 356/438
Name: Optics: measuring and testing > For light transmission or absorption > Of fluent material > Gas > Exhaust, dust or smoke
Description: Subject matter wherein there is a gas which includes entrained solid particles of dust or smoke.










Sub-classes under this class:

Class Number Class Name Patents
356/439 Contained 137


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8711358 Submersible remote smoke sensor Apr. 29, 2014
8705038 Duct detector Apr. 22, 2014
8695400 System and method for determining readings of gases and/or an aerosol for a machine Apr. 15, 2014
8654335 Method and device for quantification of gases in plumes by remote sensing Feb. 18, 2014
8649013 Probe for gas analysis Feb. 11, 2014
8638436 Smoke sensor Jan. 28, 2014
8625099 Particle concentration measuring device Jan. 7, 2014
8559721 Filter mosaic for detection of fugitive emissions Oct. 15, 2013
8534116 Size segregated aerosol mass concentration measurement with inlet conditioners and multiple detectors Sep. 17, 2013
8531671 Apparatus and methods for determining the concentration of black carbon particles in a combustion exhaust Sep. 10, 2013
8508376 Particle detector, system and method Aug. 13, 2013
8482735 Laser gas analyzer Jul. 9, 2013
8395778 Soot number determining device and method for determining a soot number Mar. 12, 2013
8359903 Photoacoustic detector with two beam paths for excitation light Jan. 29, 2013
8330957 Device and method for quantification of gases in plumes by remote sensing Dec. 11, 2012
8294899 Mapping concentrations of airborne matter Oct. 23, 2012
8294587 Smoke detector and method of checking blockage of its smoke holes Oct. 23, 2012
8289178 Electro/optical smoke analyzer Oct. 16, 2012
8284404 Cavity enhanced trace gas detection gradiometer Oct. 9, 2012
8248612 Oxygen concentration sensors and methods of rapidly measuring the concentration of oxygen in fluids Aug. 21, 2012
8243274 Portable diesel particulate monitor Aug. 14, 2012
8223337 Apparatus, system, and method for aftertreatment control and diagnostics Jul. 17, 2012
8218146 System and method for detecting a target substance Jul. 10, 2012
8218147 Apparatus, system, and method for detecting engine fluid constituents Jul. 10, 2012
8208143 Exhaust gas analyzer Jun. 26, 2012
8155890 Exhaust gas analysis method and exhaust gas analysis apparatus Apr. 10, 2012
8134711 Device for remote sensing of vehicle emission Mar. 13, 2012
8116854 Imaging tray with medium disposed therein for ratiometric determination of object shape Feb. 14, 2012
8115931 Photoacoustic detector for measuring fine dust Feb. 14, 2012
8107080 Environmental control of fluid samples, calibration, and detection of concentration levels Jan. 31, 2012
8084259 Method of insuring the integrity of a filtering element Dec. 27, 2011
8085157 Smoke detectors Dec. 27, 2011
8049895 Instrument for measuring particle parameters Nov. 1, 2011
8047055 Size segregated aerosol mass concentration measurement with inlet conditioners and multiple detectors Nov. 1, 2011
8040518 Cavity enhanced trace gas detection gradiometer Oct. 18, 2011
8004684 Sensor head for a dry powder agent Aug. 23, 2011
7948627 Photoelectric smoke detector May. 24, 2011
7936460 Sensor unit in exhaust gas analyzer May. 3, 2011
7932490 Size segregated aerosol mass concentration measurement device Apr. 26, 2011
7884731 Photoelectric smoke sensor and lighting equipment Feb. 8, 2011
7872584 Analyzing smoke or other emissions with pattern recognition Jan. 18, 2011
7847945 Making and using doppler shifted measurements in gas filter correlation radiometry Dec. 7, 2010
7760359 Beam detector distance measurement Jul. 20, 2010
7760355 Focused droplet nebulizer for evaporative light scattering detector Jul. 20, 2010
7746239 Light scattering type smoke detector Jun. 29, 2010
7742170 Method and system for countering laser technology Jun. 22, 2010
7729510 Method for distinguishing a smoke condition from a dust condition using video images Jun. 1, 2010
7696501 Apparatus for monitoring engine exhaust Apr. 13, 2010
7697140 Photoelectric smoke detector Apr. 13, 2010
7675616 Combustion plume absorption gauge Mar. 9, 2010

1 2 3 4 5










 
 
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