ClassID:

168975

G01N31/224 - CPC Classification

Classification description:

Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols for investigating presence of dangerous gases

Recent Application in this class:
#1
20250216367
2025-07-03

HYDROGEN SULFIDE TEST KIT AND METHOD FOR DETECTING HYDROGEN SULFIDE IN AN AQUEOUS SAMPLE

#2
20240344997
2024-10-17

OPTICAL DETECTION CHIP AND OPTICAL DETECTION SYSTEM

#3
20230220772
2023-07-13

APPARATUSES, SYSTEMS, AND METHODS FOR DETECTING AND MONITORING A NATURAL GAS STREAM

#4
20230160830
2023-05-25

CARBON DIOXIDE DETECTOR

#5
20220299491
2022-09-22

SYSTEM AND METHOD FOR TRACKING OF CHEMICAL AND ODOR EXPOSURES

#6
20220091080
2022-03-24

GAS AND/OR CHEMICAL LIQUID INDICATOR

#7
20210372982
2021-12-02

Self-timing module passive chemical dosimeters

#8
20210310957
2021-10-07

ENVIRONMENTAL SENSOR

#9
20210231624
2021-07-29

AZOCALIXARENE PROBE AND ITS USE FOR DETECTING CARBON DIOXIDE

#10
20210188447
2021-06-24

Aircraft air supply and contaminant detection system

#11
20210033580
2021-02-04

PASSIVE CHRONOMETRIC TAMPER-INDICATING DEVICE AND METHOD

#12
20200333272
2020-10-22

Method for predicting corrosion and spontaneous combustion of sulfur-related petrochemical equipment

#13
20200116674
2020-04-16

Detection of Substances of Interest Using Gas-Solid Phase Chemistry

#14
20200110038
2020-04-09

METHOD AND APPARATUS FOR MONITORING AIR SAMPLES FOR ILLICIT DRUGS

#15
20200103385
2020-04-02

Hydrogen-detecting composite particles and manufacturing method thereof

#16
20200010201
2020-01-09

Aircraft air supply and contaminant detection system

#17
20190293618
2019-09-26

Battery including gas detector for detecting gas in void between seal region and power generating element

#18
20190187062
2019-06-20

Environmental sensor

#19
20190170615
2019-06-06

Apparatus and methods of collecting and sampling fluids

#20
20190137405
2019-05-09

SYSTEM FOR MONITORING AIR QUALITY IN AN ENCLOSED ENVIRONMENT

#21
20190120769
2019-04-25

Colorimetric aerosol and gas detection for aerosol delivery device

#22
20190039068
2019-02-07

Oxidant sensor

#23
20180306761
2018-10-25

System and method for tracking of chemical and odor exposures

#24
20180164264
2018-06-14

FILTER FOR VISUAL GAS SENSOR

#25
20180120276
2018-05-03

GAS MOLECULE SENSOR

#26
20180120274
2018-05-03

Chemical sensors for detection and display of environmental hazards

#27
20180119194
2018-05-03

Metalloprotein compositions

#28
20180024113
2018-01-25

THERMOELECTRIC SENSOR FOR ANALYTES IN A GAS AND RELATED METHOD

#29
20180024102
2018-01-25

Battery including gas detector for detecting gas in void between seal and power generator

#30
20170284977
2017-10-05

Detection of substances of interest using gas-solid phase chemistry

#31
20170212088
2017-07-27

DETECTION OF GAS-PHASE ANALYTES USING LIQUID CRYSTALS

#32
20170191970
2017-07-06

Color changeable hydrogen detection sensor based on molybdenum oxide and method of manufacturing the same

#33
20170160205
2017-06-08

Colorimetric detection sensor and colorimetric detection method for detecting cyanide anion by etching of gold nanorods

#34
20160377583
2016-12-29

Chlorine-concentration-measuring composition

#35
20160327529
2016-11-10

Monoazo-based dye for acid detection

#36
20160258914
2016-09-08

Methods for using rose bengal for detection of chemical warfare agents

#37
20160257683
2016-09-08

Chromophores for the detection of volatile organic compounds

#38
20160237556
2016-08-18

Method for producing a hydrogen-detection sensor and resulting sensor

#39
20160202221
2016-07-14

Material for detecting phenol derivatives and applications thereof

#40
20160202220
2016-07-14

Liquid phase phenol analysis

#41
20160091477
2016-03-31

Dual sensor analyzer

#42
20160033419
2016-02-04

Color-change sensor using film for detecting harmful material

#43
20150285716
2015-10-08

Apparatus and methods of collecting and sampling hydrocarbon fluids

#44
20150185115
2015-07-02

Sampling container for collection of fluids

#45
20150065365
2015-03-05

Thermoelectric sensor for analytes in a gas and related method

#46
20150050195
2015-02-19

Chlorine analytical test element and a stabilized N, N-diethyl-p-phenylenediamine solution

#47
20150037900
2015-02-05

Point of Care Cyanide Test Device and Kit

#48
20140295569
2014-10-02

Reagent for detection and assessment of free chlorine in aqueous solution

#49
20140295568
2014-10-02

Reagent for detection and assessment of total chlorine in aqueous solution

#50
20140205505
2014-07-24

Sorbent media exhaustion indicator

#51
20140179014
2014-06-26

FLUORESCENT NITRIC OXIDE PROBES AND ASSOCIATED METHODS

#52
20140017144
2014-01-16

Hydrogen sulphide sampling method

#53
20130302903
2013-11-14

Fluorescent nitric oxide probes and associated methods

#54
20130280817
2013-10-24

Multifunctional sol-gel detector for gaseous compounds and detection and trapping methods therewith

#55
20130149788
2013-06-13

ASSAY FOR QUANTIFYING ELEMENTAL SULFUR LEVELS IN A SAMPLE

#56
20130137184
2013-05-30

Nitric oxide detection element and process for producing same

#57
20130130399
2013-05-23

CO2 Indicator

#58
20130078731
2013-03-28

Chromophores for the detection of volatile organic compounds

#59
20120282705
2012-11-08

Explosives detection substrate and methods of using the same

#60
20120234114
2012-09-20

Sampling container for collection of fluids

#61
20120122228
2012-05-17

Compositions and methods for the detection of chemical warfare agents

#62
20110281742
2011-11-17

Method for identifying electrophiles and nucleophiles in a sample

#63
20110217788
2011-09-08

Measurement method for measuring the level of halogen agents in swimming-pool water

#64
20110111507
2011-05-12

Downhole spectroscopic hydrogen sulfide detection

#65
20110104809
2011-05-05

Downhole spectroscopic hydrogen sulfide detection

#66
20110033943
2011-02-10

Hydrogen sulphide sampling method

#67
20110014717
2011-01-20

Sensor System and Methods for Chemical Detection

#68
20100136704
2010-06-03

Process for detecting gaseous halogenated compounds

#69
20100124516
2010-05-20

Device for determining total chlorine in liquids

#70
20100074800
2010-03-25

Ozone detecting device

#71
20100022010
2010-01-28

CHEMICAL AGENT DETECTION METHOD AND APPARATUS

#72
20090301382
2009-12-10

Monitoring system based on etching of metals

#73
20090107667
2009-04-30

Downhole spectroscopic hydrogen sulfide detection

#74
20090004747
2009-01-01

FILM SENSORS FOR DETECTING FREE CHLORINE

#75
20080145947
2008-06-19

Detection of formaldehyde in urine samples

#76
20080076185
2008-03-27

Device for determining chlorine dioxide and method

#77
20080056946
2008-03-06

Thermoelectric sensor for analytes in a fluid and related method

#78
20070224691
2007-09-27

Composition for measuring concentration of residual chlorine

#79
20070134129
2007-06-14

Ozone gas sensing element

#80
20070099351
2007-05-03

Sensing system

#81
20070087444
2007-04-19

Adsorbent composition with reactive indicator

#82
20070072305
2007-03-29

Composition for measuring residual chlorine concentration

#83
20070065944
2007-03-22

Stabilizing Griess reagent for explosives detection

#84
20060249683
2006-11-09

Remote biological, chemical and explosive detector

#85
20060073603
2006-04-06

Reagent delivery and photometric chlorine analysis

#86
20060073071
2006-04-06

Extended life mineral acid detection tape

#87
20060024836
2006-02-02

Quantitative analysis of nitrogen oxides occluded in heterogeneous catalysis

#88
20050207944
2005-09-22

Gas sensing material and gas inspecting method

#89
13650636
2015-10-06

Portable carbon monoxide test device for scuba air tanks

#90
13271473
2015-09-15

Remote gas sample analysis and monitoring system