ClassID:

106433

C10L2290/548 - CPC Classification

Classification description:

Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units; Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel Membrane- or permeation-treatment for separating fractions, components or impurities during preparation or upgrading of a fuel

Recent Application in this class:
#1
20260108845
2026-04-23

HYBRID MEMBRANE AND PRESSURE SWING ADSORPTION NITROGEN REMOVAL SYSTEM

#2
20260092229
2026-04-02

MIXED MEMBRANE-TYPE PROCESS FOR FUEL GAS UPGRADING

#3
20260062635
2026-03-05

MULTI-GAS PROCESSING AND TRANSPORT SYSTEM

#4
20260022303
2026-01-22

ARRANGEMENT FOR REGULATION OF A PLANT FOR THE MEMBRANE PERMEATION TREATMENT OF BIOGAS

#5
20260021444
2026-01-22

SYSTEMS AND METHODS OF RENEWABLE NATURAL GAS PROCESSING

#6
20250352943
2025-11-20

METHOD AND SYSTEM FOR UPGRADING BIOGAS

#7
20250345743
2025-11-13

SYSTEMS AND METHODS OF RENEWABLE NATURAL GAS PROCESSING

#8
20250333660
2025-10-30

System and Method for Producing Renewable Natural Gas from Biogas

#9
20250235816
2025-07-24

PETROLEUM GAS (LPG) RECOVERY FROM GAS STREAMS

#10
20250214030
2025-07-03

URETHANE CATIONIC POLY(IONIC LIQUIDS), THEIR DENSE AND COMPOSITE MEMBRANES, THEIR USE AND METHOD FOR REMOVING CO2 FROM NATURAL GAS OR AN EXHAUST GAS

#11
20250177910
2025-06-05

SYSTEMS AND METHODS OF RENEWABLE NATURAL GAS PROCESSING

#12
20250177909
2025-06-05

SYSTEMS AND METHODS OF RENEWABLE NATURAL GAS PROCESSING

#13
20250136884
2025-05-01

Bio LNG Production Using Membranes

#14
20250115817
2025-04-10

PROCESS FOR CONTROLLING CO2 OVER H2S RATIO IN OIL AND GAS PROCESSING INSTALLATIONS

#15
20250101328
2025-03-27

RADON LEVEL MANAGEMENT OF NATURAL GAS FROM UNCONVENTIONAL AND CONVENTIONAL RESOURCES

#16
20250101327
2025-03-27

GENERATION OF AMMONIA/HYDROGEN MIXTURES AND/OR HYDROGEN-ENRICHED FUEL MIXTURES

#17
20240352366
2024-10-24

PLANT AND PROCESS FOR PRODUCTION OF PURIFIED METHANE

#18
20240218127
2024-07-04

CROWN ETHER-CONTAINING POLYMERS

#19
20240198282
2024-06-20

TUNABLE H2S AND CO2 CONDENSABILITY MEMBRANES FOR H2S AND CO2 REMOVAL FROM SOUR NATURAL GAS

#20
20240131469
2024-04-25

PURIFICATION OF METHANE CONTAINING GAS STREAMS USING SELECTIVE MEMBRANE SEPARATION

#21
20240093108
2024-03-21

SYSTEM AND METHOD FOR RECOVERY OF FUEL GAS FROM CRUDE OIL PURIFICATION

#22
20240024828
2024-01-25

HALOGEN-SUBSTITUTED 9,9-BIS(4-AMINOPHENYL)FLUORENE BASED POLYIMIDE MEMBRANES FOR GAS SEPARATION APPLICATIONS

#23
20240001293
2024-01-04

PRODUCTION OF COMPRESSED NATURAL GAS FROM RAW BIOGAS USING GAS SEPARATION MEMBRANES INTEGRATED WITH COMPRESSOR TRAIN

#24
20230415111
2023-12-28

Continuous Gas Separation System Combining Hydrate-based Process and Reverse Osmosis Process and Disturbance Device

#25
20230415095
2023-12-28

High selectivity polyimide/PES blend hollow fiber membrane for gas separations

#26
20230390695
2023-12-07

PRODUCTION OF BIOMETHANE USING MULTIPLE TYPES OF MEMBRANE

#27
20230374390
2023-11-23

CONVERTING BIOMASS TO LPG

#28
20230340348
2023-10-26

CO-philic crosslinked polyethylene glycol-based membranes for acid and sour gas separations

#29
20230338889
2023-10-26

FACILITY AND METHOD FOR PRODUCING BIOMETHANE WITH LIMITED METHANE LOSS AND LIMITED CO2 EMISSIONS

#30
20230277980
2023-09-07

High free volume membrane for gas separation

#31
20230219033
2023-07-13

Apparatus and method for mixing transmission and separation of hydrogen gas and natural gas recovered based on pressure energy

#32
20230211281
2023-07-06

Integrated compression and membrane separation process for removal of CO2 from raw natural gas

#33
20230201760
2023-06-29

METHOD AND SYSTEM FOR DESIGNING AND ASSESSING THE PERFORMANCE OF A HOLLOW FIBRE MEMBRANE CONTACTOR (MBC) IN A NATURAL GAS SWEETENING PROCESS

#34
20230182070
2023-06-15

Stacked membranes and their use in gas separation

#35
20230128376
2023-04-27

HIGH SELECTIVITY AND HIGH CO2 PLASTICIZATION RESISTANT POLYMERIC MEMBRANES FOR GAS SEPARATIONS

#36
20230027292
2023-01-26

AMORPHOUS FLUORINATED COPOLYMERS AND METHODS OF MAKING AND USING THE SAME

#37
20230026781
2023-01-26

Gas separation article, a method for producing said gas separation article and use thereof

#38
20230018173
2023-01-19

High selectivity membranes for hydrogen sulfide and carbon dioxide removal from natural gas

#39
20230016870
2023-01-19

Gas separation membranes

#40
20220401877
2022-12-22

Reducing acid gases from streams

#41
20220380693
2022-12-01

Reservoir management by controlling acid gas build-up in reservoir by partial CO2 removal processes

#42
20220306955
2022-09-29

Membranes for contaminant removal from natural gas and methods for use thereof

#43
20220298443
2022-09-22

PLANT AND PROCESS FOR OBTAINING BIOMETHANE IN ACCORDANCE WITH THE SPECIFICITIES OF A TRANSPORT NETWORK

#44
20220297055
2022-09-22

Plant for the membrane permeation treatment of a biogas stream with a membrane separation unit containing two modules

#45
20220259512
2022-08-18

METHOD AND SYSTEM FOR OBTAINING COMPONENTS FROM NATURAL GAS

#46
20220213511
2022-07-07

ANAEROBIC DIGESTER AND MOBILE BIOGAS PROCESSING PLANT

#47
20220213399
2022-07-07

CO-philic crosslinked polyethylene glycol-based membranes for acid and sour gas separations

#48
20220212139
2022-07-07

High free volume membrane for gas separation

#49
20220203293
2022-06-30

TWO-STAGE MEMBRANE GAS SEPARATION WITH COOLING AND USE OF SWEEP GAS

#50
20220184550
2022-06-16

High selectivity polyimide/PES blend hollow fiber membrane for gas separations

#51
20220184549
2022-06-16

Gas separation system

#52
20220177827
2022-06-09

BIOGAS PLANT AND BIOGAS TREATMENT

#53
20220152552
2022-05-19

METHOD FOR PURIFYING BIOGAS THROUGH MEMBRANES AT NEGATIVE TEMPERATURES

#54
20220134274
2022-05-05

A DEVICE AND A MEMBRANE PROCESS FOR SEPARATING GAS COMPONENTS FROM A GAS STREAM HAVING VARYING COMPOSITION OR FLOW RATE

#55
20220105462
2022-04-07

m-PHENYLENEDIAMINE COMPOUND, POLYMER AND METHOD FOR PRODUCING THE SAME, AND GAS SEPARATION MEMBRANE, GAS SEPARATION MODULE, AND GAS SEPARATION APPARATUS USING THE POLYMER

#56
20220073833
2022-03-10

ARRANGEMENT FOR REGULATION OF A PLANT FOR THE MEMBRANE PERMEATION TREATMENT OF BIOGAS

#57
20220062818
2022-03-03

Membrane process for H2 recovery from sulfur recovery tail gas stream of sulfur recovery units and process for environmentally greener sales gas

#58
20220054973
2022-02-24

Carbon dioxide gas separation method and carbon dioxide gas separation apparatus

#59
20210316254
2021-10-14

Non-hydrocarbon gas separation device and inorganic separation membrane regeneration method

#60
20210299605
2021-09-30

Membrane process and system for high recovery of a nonpermeating gas

#61
20210292670
2021-09-23

Process for removal of sulfur and other impurities from olefinic liquefied petroleum gas

#62
20210292203
2021-09-23

Two-stage biogas production system for anaerobic digesters

#63
20210291120
2021-09-23

Multi-layer composite gas separation membranes, methods for preparation, and use

#64
20210291110
2021-09-23

Method and arrangement for recovering a helium product from natural gas by membrane unit

#65
20210275961
2021-09-09

METHOD AND SYSTEM FOR UPGRADING BIOGAS

#66
20210236986
2021-08-05

Process for treating a natural gas containing carbon dioxide

#67
20210230493
2021-07-29

Three-phase fuel composition

#68
20210213393
2021-07-15

Method of controlling structure of defects in chabazite zeolite membranes through low temperature heat treatment

#69
20210205762
2021-07-08

Curable poly(RTIL)-based mixed-matrix membranes and methods using same

#70
20210170329
2021-06-10

Plant and method for the separation of a gas mixture containing a plurality of components, in particular for obtaining biomethane

#71
20210162337
2021-06-03

Membrane nitrogen rejection process and system

#72
20210130720
2021-05-06

Method for purifying natural gas using an economizer

#73
20210129074
2021-05-06

Acidic gas separation device and acidic gas separation method

#74
20210060481
2021-03-04

Membrane permeate recycle process for use with pressure swing adsorption processes

#75
20210039052
2021-02-11

High selectivity membranes for hydrogen sulfide and carbon dioxide removal from natural gas

#76
20210031139
2021-02-04

Helium recovery from gaseous streams

#77
20200407653
2020-12-31

FACILITY FOR THE TREATMENT OF A STREAM OF METHANE AND CARBON DIOXIDE BY MEANS OF A VANE-TYPE COMPRESSOR AND OF A MEMBRANE SEPARATION UNIT

#78
20200399551
2020-12-24

Methods of igniting a fuel source, lighter fluid compositions and self-lighting charcoal briquettes

#79
20200385641
2020-12-10

METHOD AND SYSTEM FOR TREATING A FLOW BACK FLUID EXITING A WELL SITE

#80
20200316516
2020-10-08

Process and apparatus for separating gases

#81
20200269196
2020-08-27

Aromatic co-polyimide gas separation membranes derived from 6FDA-DAM-type homo-polyimides

#82
20200269195
2020-08-27

Aromatic co-polyimide gas separation membranes derived from 6FDA-6FpDA-type homo-polyimides

#83
20200269188
2020-08-27

Gas separation device

#84
20200255757
2020-08-13

Method and system for producing a gas mixture

#85
20200216374
2020-07-09

Method for inerting activated carbon in biogas purification equipment

#86
20200197858
2020-06-25

METHOD OF SEPARATING A GAS MIXTURE COMPRISING FIRST AND SECOND GASESUSING A GAS SEPARATION MEMBRANE MODULE HAVING A PLURALITY OF MEMBRANE ELEMENTS

#87
20200156040
2020-05-21

HYDROGEN PRODUCTION FROM NATURAL GAS PROCESSING USING ELECTRON BEAM IRRADIATION

#88
20200139296
2020-05-07

Method for purifying a natural gas stream

#89
20200096254
2020-03-26

Process for producing biomethane from a biogas stream, comprising solidification of the impurities

#90
20200080013
2020-03-12

Apparatus and method of preparing synthetic fuel using natural gas

#91
20190358583
2019-11-28

Carbon dioxide and hydrogen sulfide recovery system using a combination of membranes and low temperature cryogenic separation processes

#92
20190282954
2019-09-19

Membrane contactor

#93
20190247784
2019-08-15

THERMALLY REARRANGED POLYMER GAS SEPARATION MEMBRANE HAVING FLUORINATED CROSS-LINKED STRUCTURE, AND PREPARATION METHOD THEREFOR

#94
20190240612
2019-08-08

Desulfurization apparatus and desulfurization method

#95
20190224618
2019-07-25

High hydrocarbon recovery membrane plus solvent based system

#96
20190210941
2019-07-11

Production of liquids and reduced sulfur gaseous products from sour natural gas

#97
20190193020
2019-06-27

Reducing acid gases from streams

#98
20190184332
2019-06-20

HELIUM PURITY ADJUSTMENT IN A MEMBRANE SYSTEM

#99
20190169517
2019-06-06

Integrated PTSA/membrane method and system for H2S and CO2 removal from biogas

#100
20190161511
2019-05-30

Method for separation of acids and sugars to reduce energy consumption

#101
20190151816
2019-05-23

Gas-To-Liquids Conversion Process Using Electron-Beam Irradiation

#102
20190105603
2019-04-11

Systems and methods to remove mercaptans from sour gas using membranes

#103
20190105601
2019-04-11

Systems and methods to debottleneck an integrated oil and gas processing plant with sour gas injection

#104
20190105600
2019-04-11

Systems and methods to debottleneck an integrated oil and gas processing plant with sour gas injection

#105
20190105599
2019-04-11

Systems and methods to dehydrate high acid gas streams using membranes in an oil and gas processing plant

#106
20190060845
2019-02-28

Crosslinked polymeric blended membranes for gas separation

#107
20190054423
2019-02-21

HIGH TEMPERATURE AND PRESSURE LIQUID DEGASSING SYSTEMS

#108
20190054416
2019-02-21

Integration of cold solvent and acid gas removal

#109
20190030491
2019-01-31

METHODS FOR PREPARING CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES FOR GAS SEPARATION

#110
20190030482
2019-01-31

Production of biomethane using multiple types of membrane

#111
20190022556
2019-01-24

SYSTEMS AND METHODS FOR ORGANIC COMPOUND STORAGE AND TRANSFER

#112
20190001273
2019-01-03

PVP- and/or PVL-containing composite membranes and methods of use

#113
20190001263
2019-01-03

Method for producing biomethane by purifying biogas from non-hazardous waste storage facilities and facility for implementing the method

#114
20180369746
2018-12-27

Method for separating carbon dioxide and apparatus for separating carbon dioxide

#115
20180363978
2018-12-20

TREATING RAW NATURAL GAS

#116
20180361310
2018-12-20

METHOD AND SYSTEM FOR PURIFICATION OF NATURAL GAS USING MEMBRANES

#117
20180353898
2018-12-13

Helium recovery from gaseous streams

#118
20180346833
2018-12-06

Process and system for recovering natural gas liquids (NGL) from flare gas using Joule-Thomson (J-T) cooling and membrane separation

#119
20180345230
2018-12-06

High permeance and high selectivity facilitated transport membranes for olefin/paraffin separations

#120
20180345229
2018-12-06

Cardo-type co-polyimide membranes for sour gas feed separations from natural gas

#121
20180333674
2018-11-22

Device and method for separating a gas mixture

#122
20180291296
2018-10-11

Methods of igniting a fuel source, lighter fluid compositions and self-lighting charcoal briquettes

#123
20180283779
2018-10-04

Natural-gas purification apparatus

#124
20180283778
2018-10-04

Natural-gas purification apparatus

#125
20180283777
2018-10-04

Natural-gas purification apparatus

#126
20180280887
2018-10-04

Natural-gas purification apparatus

#127
20180274350
2018-09-27

Natural gas apparatus and method for in-situ processing

#128
20180272275
2018-09-27

Method for separating carbon dioxide

#129
20180272272
2018-09-27

Nonhydrocarbon gas separation device and nonhydrocarbon gas separation method

#130
20180266759
2018-09-20

System and method for processing a hydrocarbon-comprising fluid

#131
20180264412
2018-09-20

Fluid separation membrane module assembly

#132
20180264399
2018-09-20

MEMBRANE CONTACTOR COMPRISING A COMPOSITE MEMBRANE OF A POROUS LAYER AND A NON-POROUS SELECTIVE POLYMER LAYER FOR CO2 SEPARATION FROM A MIXED GASEOUS FEED STREAM

#133
20180251694
2018-09-06

Method and system for providing upgraded biogas

#134
20180250627
2018-09-06

PLANT AND METHOD FOR THE MEMBRANE PERMEATION TREATMENT OF A GASEOUS FEEDSTREAM COMPRISING METHANE AND CARBON DIOXIDE

#135
20180243684
2018-08-30

METHOD FOR SEPARATING CARBON DIOXIDE

#136
20180229181
2018-08-16

Carbon molecular sieve membranes for aggressive gas separations

#137
20180223205
2018-08-09

Integrated PTSA/membrane method and system for HS and COremoval from biogas

#138
20180221813
2018-08-09

Modified siloxane composite membranes for heavy hydrocarbon recovery

#139
20180133644
2018-05-17

Multiple membrane separation process using glassy polymeric membrane and rubbery polymeric membrane

#140
20180126328
2018-05-10

METHODS AND APPARATUSES FOR FUEL GAS CONDITIONING VIA MEMBRANES

#141
20180112142
2018-04-26

Method and system for providing upgraded biogas

#142
20180050310
2018-02-22

Chemically and UV cross-linked high selectivity polyimide membranes for gas separations

#143
20180050309
2018-02-22

High selectivity copolyimide membranes for separations

#144
20180028965
2018-02-01

System and method for separating carbon dioxide from natural gas

#145
20180021741
2018-01-25

Gas separation membrane, gas separation module, gas separation apparatus, and gas separation method

#146
20180002623
2018-01-04

Subsea fluid processing system

#147
20170368504
2017-12-28

On-board fuel adjustment by molecular separation

#148
20170335213
2017-11-23

Method for removing hydrogen sulfide from an acid gas

#149
20170333836
2017-11-23

Gas separation asymmetric membrane, gas separation module, gas separation device, and gas separation method

#150
20170333835
2017-11-23

Gas separation membrane, gas separation module, gas separation apparatus, gas separation method, and method for producing asymmetric gas separation membrane

#151
20170327758
2017-11-16

Natural gas refining apparatus and system

#152
20170320009
2017-11-09

CO2 separation device in gas and its membrane separation method and method for controlling membrane separation of CO2 separation device in gas

#153
20170304769
2017-10-26

METHOD FOR PURIFYING BIOGAS THROUGH MEMBRANES AT NEGATIVE TEMPERATURES

#154
20170291121
2017-10-12

Membrane-based washing and deacidification of oils

#155
20170267785
2017-09-21

PROCESS FOR THE CONVERSION OF CELLULOSE

#156
20170254188
2017-09-07

Natural gas apparatus and method for in-situ processing

#157
20170226438
2017-08-10

Membrane Filter Element With Multiple Fiber Types

#158
20170225116
2017-08-10

Method and apparatus for removing high concentration acid gas from natural gas

#159
20170198227
2017-07-13

Multistage membrane separation and purification process and apparatus for separating high purity methane gas

#160
20170189850
2017-07-06

Sour gas feed separations and helium recovery from natural gas using block co-polyimide membranes

#161
20170167639
2017-06-15

Carbon dioxide shielded natural gas line and method of using thereof

#162
20170157557
2017-06-08

Method and system for purification of natural gas using membranes

#163
20170157556
2017-06-08

Method and system for purification of natural gas using membranes

#164
20170157555
2017-06-08

METHOD AND SYSTEM FOR PURIFICATION OF NATURAL GAS USING MEMBRANES

#165
20170114294
2017-04-27

DEVICE FOR THE REMOVAL AND SEPARATION OF HELIUM ISOTOPES FROM NATURAL GAS

#166
20170015612
2017-01-19

Divalent ion removal from monoethylene glycol (MEG) feed streams

#167
20170014753
2017-01-19

Process design for acid gas removal

#168
20160346723
2016-12-01

Method for inerting activated carbon in biogas purification equipment

#169
20160326446
2016-11-10

Process and system for recovering natural gas liquids (NGL) from flare gas using joule-thomson (J-T) cooling and membrane separation

#170
20160303506
2016-10-20

Processes for cooling a wet natural gas stream

#171
20160289580
2016-10-06

Method for producing biomethane incorporating the production of heat for the methaniser using membrane separation

#172
20160279561
2016-09-29

Method and system for COrejection with a two stage membrane process

#173
20160250581
2016-09-01

Methods and systems of enhanced carbon dioxide recovery

#174
20160215224
2016-07-28

Chemical Substance Production System and Chemical Substance Production Method

#175
20160184771
2016-06-30

POLYIMIDE MEMBRANE FOR H2S REMOVAL

#176
20160184770
2016-06-30

POLYIMIDE MEMBRANE FOR H2S REMOVAL

#177
20160168491
2016-06-16

Converting ethane to liquid fuels and chemicals

#178
20160152905
2016-06-02

Biomass to transportation fuels using a Fischer-Tropsch process

#179
20160131424
2016-05-12

Refining assemblies and refining methods for rich natural gas

#180
20160130515
2016-05-12

Refining assemblies and refining methods for rich natural gas

#181
20160115099
2016-04-28

Methods and apparatuses for reforming of hydrocarbons including recovery of products using a recovery zone, a pressure swing adsorption zone, and a membrane separation zone

#182
20160114305
2016-04-28

Gas-to-liquids conversion process using electron beam irradiation

#183
20160101386
2016-04-14

Grafted polymer nanocomposite materials, systems, and methods

#184
20160074815
2016-03-17

Separation membranes formed from perforated graphene and methods for use thereof

#185
20160002130
2016-01-07

Divalent ion removal from monoethylene glycol (MEG) feed streams

#186
20150376526
2015-12-31

Apparatuses and methods for removing impurities from a hydrocarbon stream

#187
20150353853
2015-12-10

Fuel separation method

#188
20150336046
2015-11-26

Control of gas composition of a gas separation system having membranes

#189
20150329792
2015-11-19

Advanced cellulosic renewable fuels

#190
20150328583
2015-11-19

Method and apparatus for removing high concentration acid gas from natural gas

#191
20150299596
2015-10-22

METHODS FOR REMOVING CONTAMINANTS FROM NATURAL GAS

#192
20150284651
2015-10-08

Method and apparatus for generating a methane-containing substitute natural gas and related energy supply system

#193
20150258505
2015-09-17

Gas separation membrane, gas separation module, gas separation apparatus, and gas separation method

#194
20150258503
2015-09-17

Separation membranes formed from perforated graphene and methods for use thereof

#195
20150210936
2015-07-30

Method and system for treating a flow back fluid exiting a well site

#196
20150203767
2015-07-23

Process for removing gases from a sweetened hydrocarbon stream, and an apparatus relating thereto

#197
20150165390
2015-06-18

Carbon-dioxide-separating membrane

#198
20150121952
2015-05-07

Production method and production system for natural gas

#199
20150099905
2015-04-09

Process to recover alcohol with reduced water from overhead of acid column

#200
20150013380
2015-01-15

Method for separating off acid gases from natural gas

#201
20150011815
2015-01-08

Composite hollow fiber membranes useful for COremoval from natural gas

#202
20150005562
2015-01-01

Process for removing one or more sulfur compounds and an apparatus relating thereto

#203
20140309471
2014-10-16

Sweetening of natural gas

#204
20140251128
2014-09-11

Process for obtaining highly pure methane from biogas, and plant for carrying out the process

#205
20140243574
2014-08-28

Helium recovery from natural gas

#206
20140243572
2014-08-28

Hybrid membrane system for gas streams with condensable hydrocarbons

#207
20140123544
2014-05-08

Method for preparing biodiesel

#208
20140116248
2014-05-01

Selective gas transport films that contain brominated styrene-butadiene copolymers

#209
20140066682
2014-03-06

Process and apparatus for extracting sulfur compounds in a hydrocarbon stream

#210
20130289289
2013-10-31

Process for the production of lipids from biomass

#211
20130260428
2013-10-03

Process for preparing biodiesel from renewable oil and fat catalyzed by lipase with online dehydration

#212
20130108531
2013-05-02

Process For Natural Gas Purification

#213
20130067803
2013-03-21

Advanced cellulosic renewable fuels

#214
20120323059
2012-12-20

Process of separating gases using polyimide membranes

#215
20120297977
2012-11-29

Selective polysulfide composite membrane

#216
20120277497
2012-11-01

Process to recover alcohol with reduced water from overhead of acid column

#217
20120168154
2012-07-05

Use of gas-separation membranes to enhance production in fields containing high concentrations of hydrogen sulfides

#218
20110226603
2011-09-22

Method And Device For Producing Operating Materials Or Fuels

#219
20100212501
2010-08-26

Membrane filter element with multiple fiber types

#220
20080092435
2008-04-24

METHODS OF PURIFYING BIODIESEL FUELS

#221
19081394
2025-10-28

System and method for producing renewable natural gas from biogas

#222
18910255
2025-04-15

System and method for producing renewable natural gas from biogas

#223
18644398
2024-11-12

System and method for producing renewable natural gas from biogas

#224
18424094
2025-04-22

System and method for cleaning of biogas

#225
18424009
2025-04-01

System and method for cleaning of biogas

#226
18235472
2024-05-14

System and method for producing renewable natural gas from biogas

#227
18082979
2023-12-05

Hybrid membranes with functionalized fillers for natural gas sweetening

#228
15472426
2018-08-21

Super high permeance and high selectivity rubbery polymeric membranes for separations