ClassID:

169092

G01N33/2841 - CPC Classification

Classification description:

Investigating or analysing materials by specific methods not covered by groups -; Oils; viscous liquids; paints; inks; Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel gas in oil, e.g. hydrogen in insulating oil

Recent Application in this class:
#1
20260110631
2026-04-23

PREDICTION OF PERCENTAGE LEVELS OF GASES THAT ARE UNDETECTABLE VIA OPTICAL ABSORPTION MEASUREMENTS

#2
20260065206
2026-03-05

HYBRID MODELING SYSTEM FOR OILFIELD PERFORMANCE OPTIMIZATION

#3
20250377276
2025-12-11

HYDRAULIC DISSOLVED AIR MEASUREMENT SYSTEM AND METHOD

#4
20250297539
2025-09-25

METHOD AND SYSTEM FOR OPTIMIZATION OF DEVELOPMENT BY CARBON DIOXIDE INJECTION BASED ON INCOMPLETE MISCIBILITY CHARACTERISTICS

#5
20250283787
2025-09-11

Dissolved Gas Analysis System and Method

#6
20250147002
2025-05-08

STATE BASED OPERATION OF ELECTRICAL EQUIPMENT

#7
20250123259
2025-04-17

SYSTEM AND METHOD FOR ANALYZING GAS COMPOSITION CONTENT OF TRANSFORMER OIL

#8
20250122800
2025-04-17

SENSOR FOR QUANTIFYING PRODUCTION FLUID PERCENTAGE CONTENT

#9
20250116648
2025-04-10

MUD LOGGING OF NATURAL HYDROGEN

#10
20250116647
2025-04-10

METHODS OF ASSESSING A CAPROCK IN A GEOLOGIC SEQUENCE FOR CAPROCK DEFECTS

#11
20250076274
2025-03-06

PROCESSES AND SYSTEMS FOR MONITORING ONE OR MORE GASES DISSOLVED IN A LIQUID

#12
20250060352
2025-02-20

METHOD FOR ESTIMATING THE REAL-TIME GAS-OIL RATIO OF A FLOWING OIL WELL

#13
20240385166
2024-11-21

APPARATUS, SYSTEMS AND METHOD FOR MONITORING A PIECE OF ELECTRICAL EQUIPMENT

#14
20240353389
2024-10-24

EXPERIMENTAL DEVICE AND METHOD FOR SOLUBILITY DETERMINATION OF METHANE IN OIL-BASED DRILLING FLUID

#15
20240353245
2024-10-24

MEASUREMENT OF MASS FLOW RATE USING AN ARRAY OF DYNAMIC PRESSURE SENSORS

#16
20240288359
2024-08-29

SIMULTANEOUS DETECTION METHOD AND SYSTEM FOR DISSOLVED GAS AND PARTIAL DISCHARGE IN INSULATING OIL

#17
20240201150
2024-06-20

SYSTEM AND METHOD FOR DETERMINING GAS-WATER RATIO IN A RESERVOIR FLUID

#18
20240117737
2024-04-11

Measuring drilling fluid hydrogen sulfide with smart polymers

#19
20240069003
2024-02-29

DIAGNOSTIC SYSTEM DIRECTLY CONNECTED TO A SUBTERRANEAN FORMATION FOR CARBON DIOIXDE MONITORING

#20
20240053323
2024-02-15

TRANSFORMER MALFUNCTION DIAGNOSIS DEVICE AND MALFUNCTION DIAGNOSIS METHOD USING SAME

#21
20240044862
2024-02-08

Device and method for determining the hydrocarbon-water contact position in hydro-carbon reservoir

#22
20240035627
2024-02-01

SYSTEMS AND METHODS FOR ANALYZING MULTIPHASE PRODUCTION FLUIDS UTILIZING A VERTICALLY ORIENTED FLUIDIC SEPARATION CHAMBER

#23
20240035376
2024-02-01

Sensor for quantifying production fluid percentage content

#24
20240027031
2024-01-25

Systems and methods for volume fraction analysis of production fluids utilizing a vertically oriented fluidic separation chamber

#25
20230374902
2023-11-23

Predicted bias correction for a gas extractor and fluid sampling system

#26
20230358722
2023-11-09

MEASUREMENT AND CONTROL OF ENTRAINED AIR AND FOAM IN METALWORKING FLUIDS

#27
20230340876
2023-10-26

INTEGRATED TIME-LAPSE GAS GEOCHEMISTRY AND EQUATION OF STATE MODELING FOR EVALUATING DESORBED GAS IN PRODUCTION

#28
20230314402
2023-10-05

Detecting hydrocarbon fuels in lubrication oils

#29
20230304928
2023-09-28

ATTENUATED TOTAL REFLECTION BASED MEASUREMENT OF REFRACTIVE INDEX AND CARBON DIOXIDE CONCENTRATION

#30
20230280196
2023-09-07

Inlet dividers having a plurality of analyzing and production apertures for analyzing multiphase production fluid as well as systems incorporating the same

#31
20230160872
2023-05-25

MEASUREMENT AND CONTROL OF ENTRAINED AIR AND FOAM IN METALWORKING FLUIDS

#32
20230045584
2023-02-09

APPARATUS AND METHOD FOR DETECTING GAS

#33
20230003709
2023-01-05

Gas detection integration into a gas extractor

#34
20220307395
2022-09-29

Systems and methods for lubricant dilution detection

#35
20220307394
2022-09-29

Lubricant dilution detection system

#36
20220275724
2022-09-01

Predicting clean fluid composition and properties with a rapid formation tester pumpout

#37
20220187232
2022-06-16

GAS SENSOR AND METHOD OF SELECTIVELY DETECTING ACETYLENE AND ETHYLENE

#38
20220187187
2022-06-16

System and method for processing data from a particle monitoring sensor

#39
20220137612
2022-05-05

TRANSFORMER FAULT DIAGNOSIS AND POSITIONING SYSTEM BASED ON DIGITAL TWIN

#40
20220065404
2022-03-03

Systems and methods for volume fraction analysis of production fluids utilizing a vertically oriented fluidic separation chamber comprising an optically transparent pipe

#41
20220065403
2022-03-03

Systems and methods for analyzing multiphase production fluids utilizing a vertically oriented fluidic separation chamber comprising an optically transparent pipe

#42
20220050058
2022-02-17

Inspection device for hydraulic equipment, inspection system for hydraulic equipment, work vehicle, and inspection method for hydraulic equipment

#43
20220034777
2022-02-03

Method for producing a void fraction error curve using a device to measure a property of a multi-phase flow

#44
20220018825
2022-01-20

Deterioration estimation device, deterioration estimation method, and non-transitory storage medium that detects a degree of deterioration of oil based on color, hydrogen ion concentration and foreign matter

#45
20210396732
2021-12-23

Apparatus and method for performing gas analysis using optical absorption spectroscopy, such as infrared (IR) and/or UV, and use thereof in apparatus and method for performing dissolved gas analysis (DGA) on a piece of electrical equipment

#46
20210348069
2021-11-11

Enhanced demulsifier performance ranking procedure and algorithm based on separation efficiency

#47
20210341456
2021-11-04

ANALYSIS OF A GAS DISSOLVED IN AN INSULATING MEDIUM OF A HIGH-VOLTAGE DEVICE

#48
20210336433
2021-10-28

Transformer simulation system, and simulation and measurement method for setting value

#49
20210325361
2021-10-21

System for Indicating Content within a Fluid Container

#50
20210325360
2021-10-21

METHODS FOR DETERMINING AIR RELEASE PERFORMANCE OF LUBRICATING OILS

#51
20210270797
2021-09-02

Systems and methods for dissolved gas analysis

#52
20210125291
2021-04-29

SYSTEM AND METHOD FOR QUANTITATIVE NET PAY AND FLUID DETERMINATION FROM REAL-TIME GAS DATA

#53
20210088476
2021-03-25

Autonomous inflow control device for live flow monitoring

#54
20210065970
2021-03-04

System for sensor utilization in a transformer cooling circuit

#55
20210063293
2021-03-04

Determination of properties of a hydrocarbon fluid

#56
20210020355
2021-01-21

Dissolved gas analysis devices, systems, and methods

#57
20210003545
2021-01-07

System and method for determining the chemical composition of compounds contained in a sample

#58
20200378250
2020-12-03

Predicting clean fluid composition and properties with a rapid formation tester pumpout

#59
20200333317
2020-10-22

Analyzing fault gas concentration in liquid

#60
20200333316
2020-10-22

Method for evaluating mixing effect of CO2 oil-displacing and mixing agent and method for screening CO2 oil-displacing and mixing agent

#61
20200264156
2020-08-20

Characterization of crude oil and its fractions by fourier transform infrared (FTIR) spectroscopy analysis

#62
20200264114
2020-08-20

Dual-beam multiphase fluid analysis systems and methods

#63
20200249155
2020-08-06

Real time crude oil validation swept source spectroscopy

#64
20200211761
2020-07-02

Dissolved gas analysis devices, systems, and methods

#65
20200191763
2020-06-18

System and method for headspace monitoring in transformers

#66
20200191761
2020-06-18

Sensing system and method

#67
20200103391
2020-04-02

Apparatus for detecting internal defect in transformer

#68
20200080877
2020-03-12

Fluid contaminant detection using noise levels in magnetic flow meter sensor signals

#69
20200033280
2020-01-30

Transformer hydrogen gas monitoring system, device, and method

#70
20200018740
2020-01-16

METHOD, APPARATUS AND SYSTEM FOR DETERMINING SWEET SPOT REGION FOR SHALE OIL IN-SITU CONVERSION DEVELOPMENT

#71
20200003687
2020-01-02

Device and method for measuring the spatial distribution of the concentration of compounds and mixtures thereof in a fluid and/or the level in a fluid

#72
20190383731
2019-12-19

Apparatus and method for performing gas analysis using optical absorption spectroscopy, such as infrared (IR) and/or UV, and use thereof in apparatus and method for performing dissolved gas analysis (DGA) on a piece of electrical equipment

#73
20190304657
2019-10-03

ELECTRIC TRANSFORMER

#74
20190277826
2019-09-12

Gas logging system

#75
20190264560
2019-08-29

Downhole real-time filtrate contamination monitoring

#76
20190257812
2019-08-22

Method of estimating overheating temperature of oil-immersed electric appliance

#77
20190128749
2019-05-02

Temperature estimation method

#78
20190094137
2019-03-28

Real time crude oil validation swept source spectroscopy

#79
20180372709
2018-12-27

System and methods for methane number generation

#80
20180274730
2018-09-27

Multiphase flow meters and related methods having asymmetrical flow therethrough

#81
20180259451
2018-09-13

Dissolved gas analysis devices, systems, and methods

#82
20180217120
2018-08-02

APPARATUS AND METHOD FOR MONITORING FUEL OIL DELIVERY

#83
20180196027
2018-07-12

PLANT FOR THE TREATMENT OF A MULTIPHASIC FLUID AND METHOD FOR CHARACTERIZING SAID FLUID ONLINE

#84
20180180588
2018-06-28

Gas analysis

#85
20180143177
2018-05-24

PROCESS COMPRISING ANALYSING A FLOWING FLUID

#86
20180143176
2018-05-24

Diagnosis method for internal fault of oil-immersed electric apparatus

#87
20180095041
2018-04-05

Optical sensing system for determining hydrogen partial pressure

#88
20180088101
2018-03-29

System and method for analyzing dissolved gas in electrical insulating fluid

#89
20180059087
2018-03-01

Bi-directional oil-flow adapter for attaching to a valve-controlled port of a transformer

#90
20170336461
2017-11-23

INTERNAL TRANSFORMER COMPOSITE-DEFECT FUZZY DIAGNOSTIC METHOD BASED ON GAS DISSOLVED IN OIL

#91
20170269055
2017-09-21

Predictive modeling to estimate data values between sampling events

#92
20170261485
2017-09-14

HYDROGEN SENSOR HAVING A PROTECTION LAYER

#93
20170248570
2017-08-31

Measuring rod for verification of a flowing medium in a tube and respective measuring arrangements

#94
20170212093
2017-07-27

Method and system for extracting gas or gas mixtures from a liquid for performing dissolved gas or gas mixture analysis

#95
20170199170
2017-07-13

Method for diagnosing oil-filled electrical apparatus

#96
20170165592
2017-06-15

Methods and systems for selective hydrogen gas extraction for dissolved gas analysis applications

#97
20170138921
2017-05-18

Determining properties of OBM filtrates

#98
20170089879
2017-03-30

Apparatus for measuring dissolved gas and oil immersed transformer having the same

#99
20170082595
2017-03-23

System and process of utilizing oil quality analysis and dissolved gas analysis to detect early stage problems in oil filled electrical apparatuses

#100
20170023475
2017-01-26

SINGLE ELEMENT HYDROGEN SENSING MATERIAL BASED ON HAFNIUM

#101
20170010250
2017-01-12

Method and device for dissolved gas analysis

#102
20160290896
2016-10-06

Trace gas measurement apparatus for electrical equipment

#103
20160282323
2016-09-29

Trace gas measurement apparatus for electrical equipment

#104
20160282313
2016-09-29

Trace Gas Measurement Apparatus for Electrical Equipment

#105
20160266085
2016-09-15

Apparatus and method for detecting gas

#106
20160252489
2016-09-01

Crude oil composition estimation method, absorption process simulation method in absorption and liquefaction system, process simulation method in recovery system, and method of producing absorption and liquefaction system

#107
20160231303
2016-08-11

Hydrogen sensor element for measuring concentration of hydrogen gas dissolved in liquid and method for measuring concentration of hydrogen gas using same

#108
20160231229
2016-08-11

Method and system for gas concentration measurement of gas dissolved in liquids

#109
20160222782
2016-08-04

Applications of advanced isotope geochemistry of hydrocarbons and inert gases to petroleum production engineering

#110
20160195507
2016-07-07

CHARACTERIZATION OF CRUDE OIL AND ITS FRACTIONS BY FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR) ANALYSIS

#111
20160161425
2016-06-09

APPARATUS AND METHOD FOR DETERMINING A VALUE OF A PROPERTY OF A MATERIAL USING MICROWAVE

#112
20160116451
2016-04-28

Electrical apparatus oil sampler and conditioner for solid state sensors

#113
20160054286
2016-02-25

Hydrogen sensor, hydrogen detection system employing the same, and electrical device with a hydrogen detection system

#114
20160047791
2016-02-18

Sampling an oil composition for enhancing recovery of oil components

#115
20160033446
2016-02-04

Devices and methods for measuring analyte concentration

#116
20150308264
2015-10-29

Downhole real-time filtrate contamination monitoring

#117
20150300945
2015-10-22

Systems and methods of calibrating integrated computational elements

#118
20150247836
2015-09-03

Facility for processing a multiphase fluid and method for characterizing said fluid online

#119
20150226063
2015-08-13

Fluid analysis methods and apparatus for determining gas-oil ratio

#120
20150226059
2015-08-13

Determining properties of OBM filtrates

#121
20150152338
2015-06-04

METHOD FOR REDUCING QUENCH OIL FOULING IN CRACKING PROCESSES

#122
20150127277
2015-05-07

System and method for assessing power transformers

#123
20150106032
2015-04-16

Characterization of crude oil by simulated distillation

#124
20150072436
2015-03-12

Methods of Measuring Dissolved Oxygen in a Hydrocarbon Stream

#125
20150041634
2015-02-12

CHARACTERIZATION AND PREDICTION OF JET FUEL QUALITY

#126
20150020572
2015-01-22

Method for diagnosing internal fault of oil-immersed transformer through composition ratio of dissolved gas in oil

#127
20150007635
2015-01-08

Method for diagnosing internal fault of oil-immersed transformer through content ratios of dissolved gases

#128
20140331742
2014-11-13

Apparatus for monitoring aeration in fluid of hydraulic circuit

#129
20140329328
2014-11-06

Transformer hydrogen indicator

#130
20140273261
2014-09-18

Sensor assembly and method for sensing status condition of electrical equipment

#131
20140233605
2014-08-21

System for monitoring and treating transformer oil

#132
20140176936
2014-06-26

Sensor assembly and method for determining the hydrogen and moisture content of transformer oil

#133
20140165704
2014-06-19

Method and device for dissolved gas analysis

#134
20140053626
2014-02-27

System and method for monitoring asset health by dissolved gas measurement

#135
20140012507
2014-01-09

In-well full-bore multiphase flowmeter for horizontal wellbores

#136
20130247647
2013-09-26

Electrical apparatus oil sampler and conditioner for solid state sensors

#137
20130204827
2013-08-08

Internal abnormality diagnosis method, internal abnormality diagnosis system, and decision tree generation method for internal abnormality diagnosis of oil-filled electric apparatus utilizing gas concentration in oil

#138
20130138384
2013-05-30

Composite separation membrane structure for gas sensor, gas sensor apparatus comprising the same, and method and apparatus for measuring gas concentration using the same

#139
20130118234
2013-05-16

APPARATUS FOR MEASURING AIR AMOUNT OF ENGINE OIL AND METHOD USING THE SAME

#140
20120304734
2012-12-06

In-oil gas concentration measuring system and in-oil gas concentration measuring method using same system

#141
20120300210
2012-11-29

Apparatus and method for on-line, real-time analysis of chemical gases dissolved in transformer oil

#142
20120293333
2012-11-22

Fault gas alarm system

#143
20120291521
2012-11-22

Method and device for deriving the concentration of a gas dissolved in an electrical insulation oil

#144
20120290229
2012-11-15

DIAGNOSTIC METHOD AND APPARATUS FOR ASSESSING THE INSULATION CONDITION OF ELECTRICAL EQUIPMENT INSULATED WITH OIL

#145
20120247204
2012-10-04

Combined hydrogen and pressure sensor assembly

#146
20120247191
2012-10-04

Combined hydrogen and pressure sensor assembly

#147
20120247187
2012-10-04

SENSOR MOUNTING INTO THE TEMPERATURE WELL OF A TRANSFORMER

#148
20120247185
2012-10-04

Combination of hydrogen and pressure sensors

#149
20120227466
2012-09-13

METHODS FOR DETECTION OF ACETYLENE ON BIMETALLIC SENSORS

#150
20120055332
2012-03-08

Method for extracting gas from liquid

#151
20120044048
2012-02-23

System for creating, collecting, storing and providing access to data from an electric power device which contains a cooling or operating liquid

#152
20120041688
2012-02-16

Method for gas analysis of on-load tap changers

#153
20110246088
2011-10-06

System and method for monitoring dissolved gases in insulating oil of high voltage equipment

#154
20110175623
2011-07-21

Online Incipient Fault Sensor Device for Detection of Incipient Fault in Oil-Filled Electrical Apparatus Such as a Transformer

#155
20100148780
2010-06-17

System and method for qualitative and quantitative analysis of gaseous components of multiphase hydrocarbon mixtures

#156
20100077828
2010-04-01

Hydrogen sensor with air access

#157
20100005856
2010-01-14

Apparatus for performing dissolved gas analysis

#158
20090308246
2009-12-17

Apparatus and method for extracting gas from liquid

#159
20090255900
2009-10-15

Oil/gas separation membrane, its use in gas sensor and process for producing the same

#160
20080302672
2008-12-11

SYSTEMS AND METHODS FOR SENSING

#161
20080297766
2008-12-04

System and method for measuring fluid aeration

#162
20080173076
2008-07-24

Method and device for measuring the minimum miscibility pressure of two phases

#163
20080127714
2008-06-05

Quantitative measurement of production and consumption of gases in power transformers

#164
20070291898
2007-12-20

Apparatus and method for fluid phase fraction determination using x-rays

#165
20070159625
2007-07-12

Method and apparatus for estimating a property of a fluid downhole

#166
20070144236
2007-06-28

Sensor device for detection of dissolved hydrocarbon gases in oil filled high-voltage electrical equipment

#167
20070137292
2007-06-21

Methods and apparatus for oil composition determination

#168
20070124091
2007-05-31

Method and flow meter for determining the flow rate of a multiphase fluid

#169
20060208843
2006-09-21

Method and apparatus for decreasing gassing and decay of insulating oil in transformers

#170
20060162430
2006-07-27

System and method for determining an air content, air release ability and for foam forming on oil surfaces

#171
20060032742
2006-02-16

Laminated membranes for diffusion limited gas sensors resistant to pressure variations

#172
20050086998
2005-04-28

Oil/gas separation membrane, its use in gas sensor and process for producing the same

#173
20050022754
2005-02-03

Combustion gas detection system

#174
20050005674
2005-01-13

Test tap adapter for extracting dissolved gases from insulating oil and measuring electrical parameters of a transformer bushing

#175
18816248
2025-11-18

Hybrid modeling system for oilfield performance optimization

#176
18667342
2025-09-16

Real-time detection of gas kicks during drilling and gas cap gas intrusion during oil production

#177
16448594
2022-11-22

Framework and interface for assessing reservoir management competency