ClassID:

167838

G01N21/3518 - CPC Classification

Classification description:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light; Systems in which incident light is modified in accordance with the properties of the material investigated; Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands; Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infra-red light for analysing gases, e.g. multi-gas analysis Devices using gas filter correlation techniques; Devices using gas pressure modulation techniques

Recent Application in this class:
#1
20260063542
2026-03-05

GAS CORRELATION FILTER WHEEL AND GAS ANALYZER

#2
20260029338
2026-01-29

Gas Measurement Device

#3
20260023012
2026-01-22

ISOTOPE RATIO MEASURING DEVICE USING ISOTOPE NOTCH FILTER

#4
20240418648
2024-12-19

OPTICAL GAS SENSOR DEVICE, GAS SENSING METHOD AND STORAGE MEDIUM

#5
20240288364
2024-08-29

SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR UTILIZING A FIBER BRAGG GRATING TO DETECT A GAS INDICATING THE ONSET OF THERMAL RUNAWAY

#6
20240248448
2024-07-25

INSPECTION SUPPORT METHOD, INSPECTION SUPPORT APPARATUS, AND INSPECTION SUPPORT PROGRAM

#7
20240159664
2024-05-16

NITROUS OXIDE SENSOR

#8
20230366813
2023-11-16

Gas cell and method of forming the same

#9
20230288324
2023-09-14

Systems, methods, and computer program products for infrared imaging operations

#10
20230280255
2023-09-07

SYSTEMS AND METHODS FOR BLOCKAGE DETECTION IN GAS DETECTORS

#11
20230160816
2023-05-25

Systems, methods, and computer program products for infrared imaging operations

#12
20220307977
2022-09-29

Absorbance analysis apparatus for DCR gas, absorbance analysis method for DCR gas, and absorbance analysis program recording medium on which program for DCR gas is recorded

#13
20220291116
2022-09-15

GAS SUPPLY AND DISCHARGE ADAPTER AND GAS DETECTION DEVICE

#14
20220260462
2022-08-18

METHODS AND SYSTEMS FOR AUTOMATED ANALYSIS OF AEROSOL SAMPLING FILTERS

#15
20220244176
2022-08-04

Sample analyzing apparatus

#16
20220205906
2022-06-30

Multi-channel gas sensor

#17
20220170854
2022-06-02

System and method for optical detection of pathogens

#18
20220018760
2022-01-20

FTIR spectrometer with cut-off filter for hydrogen sulfide detection

#19
20210333204
2021-10-28

Methods, apparatuses, and systems for improving gas detecting devices

#20
20210310941
2021-10-07

Gas lens filter systems and methods

#21
20210003983
2021-01-07

Inspection Support Method, Inspection Support Apparatus, and Inspection Support Program

#22
20200393367
2020-12-17

Spatial image processing for enhanced gas imaging systems and methods

#23
20200309686
2020-10-01

Fluid sensor including an optical filter and a waveguide, and method for manufacturing the fluid sensor

#24
20200292447
2020-09-17

FTIR spectrometer with cut-off filter for hydrogen sulfide detection

#25
20200225111
2020-07-16

REMOTE SENSING OF NATURAL GAS LEAKS

#26
20200018735
2020-01-16

RESPIRATION GAS MONITOR WITH AUTOMATED AND NONOBTRUSIVE FILTER CALIBRATION

#27
20190302013
2019-10-03

Multi-spectral gas quantification and differentiation method for optical gas imaging camera

#28
20190277819
2019-09-12

Air pollution sensor to measure major carbon components in the environment

#29
20190257747
2019-08-22

Gas detection apparatus and method

#30
20190195792
2019-06-27

Sensor combining dust sensor and gas sensor

#31
20190154576
2019-05-23

Hyperspectral infrared sounders deployable as a constellation for low orbit MWIR atmospheric measurements

#32
20190137391
2019-05-09

Identifying targeted gaseous chemical compound

#33
20190137390
2019-05-09

Scanning IR sensor for gas safety and emissions monitoring

#34
20180299330
2018-10-18

Electromagnetic radiation detector using a planar Golay cell

#35
20180266944
2018-09-20

Scanning IR sensor for gas safety and emissions monitoring

#36
20180252640
2018-09-06

Gas concentration sensor with improved accuracy

#37
20180231460
2018-08-16

Substance detecting device, substance detecting system, and substance detecting method in which temperature control of light emission is performed

#38
20180217056
2018-08-02

Gas detection apparatus and method

#39
20180156724
2018-06-07

Method and a system for determining a composition of a gas mix in a vehicle

#40
20180095028
2018-04-05

COMPOSITION-INDEPENDENT CALIBRATION OF NONDISPERSIVE INFRARED GAS SENSORS

#41
20180059013
2018-03-01

Laser-based IR spectroscopy for measuring sulfur trioxide in the exhaust gas of gas power plants

#42
20180052072
2018-02-22

GAS LEAK LOCATION ESTIMATING DEVICE, GAS LEAK LOCATION ESTIMATING SYSTEM, GAS LEAK LOCATION ESTIMATING METHOD AND GAS LEAK LOCATION ESTIMATING PROGRAM

#43
20170370797
2017-12-28

Remote sensing of natural gas leaks

#44
20170363541
2017-12-21

Quantifying gas in passive optical gas imaging

#45
20170336322
2017-11-23

Optical filtering device for detecting gas

#46
20170030829
2017-02-02

Systems and methods for pressure differential molecular spectroscopy of compressible fluids

#47
20160320296
2016-11-03

GAS DETECTOR

#48
20160255284
2016-09-01

Thermography camera tuned to detect absorption of infrared radiation in a selected spectral bandwidth

#49
20150360171
2015-12-17

Zero gas refiner COconcentration measurement device and COconcentration measurement system

#50
20150131093
2015-05-14

Systems and methods for pressure differential molecular spectroscopy of compressible fluids

#51
20150116704
2015-04-30

Compact multi-channel gas correlation sensor and sensing methodology

#52
20140253922
2014-09-11

Dynamic reconstruction of a calibration state of an absorption spectrometer

#53
20140160278
2014-06-12

Thermography camera tuned to detect absorption of infrared radiation in a selected spectral bandwidth

#54
20130265578
2013-10-10

Independent-beam gas filter correlation radiometry with field-of-view matching

#55
20130027793
2013-01-31

Multiple Optical Beam Folding Apparatus and Method

#56
20120273680
2012-11-01

Chemical leak inspection system

#57
20120188548
2012-07-26

Gas filter correlation radiometry method and system using a dissimilar gas to detect a target gas

#58
20120154790
2012-06-21

APPARATUS, SYSTEM, AND METHOD FOR DETECTING CHEMICALS

#59
20120099109
2012-04-26

Dynamic reconstruction of a calibration state of an absorption spectrometer

#60
20120091346
2012-04-19

NDIR-two Beam Gas Analyser And Method For Determining The Concentration Of A Measuring Gas Component in a Gas Mixture by means of Said type of Gas Analyser

#61
20120075632
2012-03-29

APPARATUS AND METHOD FOR MEASURING SO3 AND H2SO4 CONCENTRATIONS IN GASES

#62
20110299084
2011-12-08

Validation and correction of spectrometer performance using a validation cell

#63
20110299076
2011-12-08

Spectrometer with validation cell

#64
20110133089
2011-06-09

Remote sensing of gas leaks

#65
20100301214
2010-12-02

Infrared camera for gas detection

#66
20100274501
2010-10-28

Systems for terrestrial target detection and characterization using a dispersed fourier transform spectrometer

#67
20100163733
2010-07-01

Airborne tunable mid-IR laser gas-correlation sensor

#68
20100134784
2010-06-03

Detector arrangement for a nondispersive infrared gas analyzer and method for the detection of a measuring gas component in a gas mixture by means of such a gas analyzer

#69
20100116021
2010-05-13

Method and apparatus for sample analysis

#70
20100102232
2010-04-29

Atmospheric gas detection apparatus and method

#71
20100025585
2010-02-04

Gas detecting method and gas detecting apparatus

#72
20100018289
2010-01-28

Gas measuring apparatus and gas measuring method

#73
20090310130
2009-12-17

Method and system for enhanced remote detection of low concentration vapors

#74
20090257622
2009-10-15

Method for remote spectral analysis of gas plumes

#75
20090168064
2009-07-02

Method and apparatus for measuring the optical absorption of samples

#76
20090102103
2009-04-23

Infrared Light Sensors for Diagnosis and Control of Industrial Furnaces

#77
20090026374
2009-01-29

Apparatus for gas concentration measurement according to gas correlation method

#78
20080283753
2008-11-20

IR sensor, especially a COsensor

#79
20080259340
2008-10-23

Airborne tunable mid-IR laser gas-correlation sensor

#80
20080231719
2008-09-25

Thermography camera configured for leak detection

#81
20080116377
2008-05-22

Method and System for Passive Remote Exhaust Emission Measurement

#82
20070271997
2007-11-29

Method and apparatus for sample analysis

#83
20070034792
2007-02-15

Method and apparatus for detecting gas concentration with infrared absorption characteristics

#84
20060208190
2006-09-21

Chemical agent sensor having a stationary linear fringe interferometer

#85
20060144126
2006-07-06

Method and apparatus for sample analysis

#86
20060132780
2006-06-22

System and method for remote sensing and/or analyzing spectral properties of targets and/or chemical species for detection and identification thereof

#87
20060091310
2006-05-04

Methods for performing inspections and detecting chemical leaks using an infrared camera system

#88
20060000219
2006-01-05

Apparatus for observing combustion conditions in a gas turbine engine

#89
20050270536
2005-12-08

Spectroscopic gas sensor, in particular for detecting at least one gas component in the ambient air, and method for manufacturing a spectroscopic gas sensor of this type

#90
20050178952
2005-08-18

Sensor for multi-band radiation detection within a field of view

#91
20050154539
2005-07-14

Processing system for remote chemical identification

#92
20050049804
2005-03-03

Localization of a point source of a visualized gas leak

#93
20050030628
2005-02-10

Very low cost narrow band infrared sensor

#94
17947014
2026-03-31

Electronic devices with breath sensing systems

#95
17002209
2022-07-19

Compact non-dispersive infrared gas analyzer

#96
15834816
2018-10-30

Non-dispersive infrared carbon dioxide gas sensor with deposited hydrophobic thin film

#97
15806714
2019-01-01

Identifying targeted gaseous chemical compound

#98
15583312
2018-04-24

Determining gas concentration near planetary surfaces