ClassID:

29671

B01D53/227 - CPC Classification

Classification description:

Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, by diffusion; Multiple stage diffusion in parallel connexion

Recent Application in this class:
#1
20260131280
2026-05-14

GAS SEPARATION MEMBRANE UNIT, GAS SEPARATION SYSTEM, AND METHOD FOR PRODUCING ENRICHED GAS

#2
20260084100
2026-03-26

Separation Device And Method For Designing Separation Device

#3
20260077298
2026-03-19

RNG GAS PROCESSING SKID AND ARRANGEMENTS INCLUDING SAME

#4
20260021446
2026-01-22

WATER PRECIPITATING DEVICES, METHODS AND SYSTEMS

#5
20260008003
2026-01-08

GAS SEPARATION SYSTEM AND METHOD FOR PRODUCING METHANE-ENRICHED GAS

#6
20250368510
2025-12-04

Methods and Systems for Removing Contaminants from Gas

#7
20250367596
2025-12-04

SYSTEMS AND METHODS FOR BIOGAS UPGRADING USING SWEEP GAS

#8
20250281872
2025-09-11

CARBON DIOXIDE SELECTIVE MEMBRANES, GAS SEPARATION SYSTEMS INCLUDING THE CARBON DIOXIDE SELECTIVE MEMBRANES, AND RELATED METHODS

#9
20250276275
2025-09-04

PROCESS TO PURIFY HELIUM FROM METHANE WITH INTEGRATED NITROGEN REJECTION USING MEMBRANE TECHNOLOGY

#10
20250229220
2025-07-17

4-Stage Membrane Process with Sweep for Biogas Upgrading

#11
20250041792
2025-02-06

Gas Separation Membrane Unit And Gas Separation Apparatus

#12
20240325967
2024-10-03

GAS STREAM ENRICHMENT USING SILICONE SEPARATOR CASCADES

#13
20240300813
2024-09-12

Hydrogen Production with Membrane Reactor

#14
20240278170
2024-08-22

APPARATUS AND METHOD FOR SIMULTANEOUSLY TREATING DIFFERENT FLUCTUATING GAS FLOWS

#15
20240269609
2024-08-15

SYSTEM AND METHOD FOR SEPARATING A GAS MIXTURE

#16
20240178423
2024-05-30

APPARATUS, SYSTEM AND METHOD FOR GENERATING NITROGEN GAS FROM FUEL-CELL EXHAUST GAS

#17
20240149222
2024-05-09

Multi-element membrane separator and separation method based on spiral-wound membrane elements

#18
20240149213
2024-05-09

HYDROGEN SEPARATION FROM NATURAL GAS

#19
20240131469
2024-04-25

PURIFICATION OF METHANE CONTAINING GAS STREAMS USING SELECTIVE MEMBRANE SEPARATION

#20
20240093108
2024-03-21

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

#21
20230405545
2023-12-21

OXYGEN TRANSPORT REACTORS FOR CO-GENERATING AMMONIA AND POWER

#22
20230330593
2023-10-19

Membrane-based hydrogen purifiers

#23
20230294039
2023-09-21

GAS SEPARATION SYSTEM AND METHOD FOR SEPARATING GAS MIXTURE

#24
20230271130
2023-08-31

A FACILITY AND A MEMBRANE PROCESS FOR SEPARATING METHANE AND CARBON DIOXIDE FROM A GAS STREAM

#25
20230264151
2023-08-24

Regenerable organic contaminant controller in space application

#26
20230115430
2023-04-13

System and method for separating a gas mixture

#27
20230114525
2023-04-13

Biogas upgrading apparatus and process

#28
20220395775
2022-12-15

Moisture removing device for a laundry appliance that incorporates a nanopore membrane

#29
20220311035
2022-09-29

Apparatus and system for generating nitrogen gas through dehumidifying and filtering fuel cell exhaust gas

#30
20220176319
2022-06-09

MEMBRANE SEPARATION UNIT, ARRANGEMENT OF MEMBRANE SEPARATION UNITS, AND MEMBRANE SEPARATION PROCESS

#31
20220168687
2022-06-02

Membrane-based hydrogen purifiers

#32
20220161197
2022-05-26

Apparatus and method for direct air capture of carbon dioxide from the atmosphere

#33
20220152552
2022-05-19

METHOD FOR PURIFYING BIOGAS THROUGH MEMBRANES AT NEGATIVE TEMPERATURES

#34
20220134274
2022-05-05

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

#35
20210395085
2021-12-23

Hydrogen production with membrane reactor

#36
20210354079
2021-11-18

Replenishing liquid material to a membrane within a multi-module system

#37
20210339189
2021-11-04

Device and a process for separating methane from a gas mixture containing methane, carbon dioxide and hydrogen sulfide

#38
20210291117
2021-09-23

Gas separation device

#39
20210239314
2021-08-05

Systems and methods for removing organic compounds from steam

#40
20210170327
2021-06-10

Membrane module for mitigating evaporative fuel emissions of automobiles

#41
20210121826
2021-04-29

Apparatus and method for direct air capture of carbon dioxide from the atmosphere

#42
20210060483
2021-03-04

Device and method for CO2 capture through circumscribed hollow membranes

#43
20210060481
2021-03-04

Membrane permeate recycle process for use with pressure swing adsorption processes

#44
20210023500
2021-01-28

Compact membrane module system for gas separation

#45
20200376438
2020-12-03

Gas separation apparatus and gas separation method

#46
20200269188
2020-08-27

Gas separation device

#47
20200254383
2020-08-13

System and method for separating a gas mixture

#48
20200206681
2020-07-02

Moisture removing device for a laundry appliance that incorporates a nanopore membrane

#49
20200164307
2020-05-28

Inert gas generator for an inerting system of an aircraft system of an aircraft fuel tank, and inerting method

#50
20200088466
2020-03-19

Helium extraction from natural gas

#51
20190232217
2019-08-01

Personal oxygen enhanced breathing system

#52
20190193021
2019-06-27

Modular membrane system and method for olefin separation

#53
20190143263
2019-05-16

Compact membrane module system for gas separation

#54
20180264412
2018-09-20

Fluid separation membrane module assembly

#55
20170368497
2017-12-28

Process for separation of gases with reduced maintenance costs

#56
20170327758
2017-11-16

Natural gas refining apparatus and system

#57
20170304769
2017-10-26

METHOD FOR PURIFYING BIOGAS THROUGH MEMBRANES AT NEGATIVE TEMPERATURES

#58
20170301940
2017-10-19

Membrane modules for hydrogen separation and fuel processors and fuel cell systems including the same

#59
20170226438
2017-08-10

Membrane Filter Element With Multiple Fiber Types

#60
20170173520
2017-06-22

Flow management and CO2-recovery apparatus and method of use

#61
20170128888
2017-05-11

Gas separation membrane module with improved gas seal

#62
20160303507
2016-10-20

GAS SEPARATION MEMBRANE MODULE WITH INTEGRATED FILTER

#63
20160288047
2016-10-06

Gas separation system and enriched gas production method

#64
20160214732
2016-07-28

Inerting fuel systems, methods, and apparatuses

#65
20160214062
2016-07-28

Separation and recycling system of perfluorinated compounds

#66
20160200446
2016-07-14

On-board aircraft nitrogen enriched air and cooling fluid generation system and method

#67
20160136571
2016-05-19

Membrane separation process and membrane plant for energy-efficient production of oxygen

#68
20160083254
2016-03-24

METHOD, DEVICE AND SYSTEM FOR ENRICHMENT OF NF3 GAS

#69
20140363344
2014-12-11

Ammonia capture recovery system

#70
20140360365
2014-12-11

Parallel feed gas separation membrane element assembly

#71
20140298994
2014-10-09

Multilayer module for hydrogen separation

#72
20140283690
2014-09-25

Membrane contactor for dehumidification systems

#73
20140264967
2014-09-18

Membrane contactor for dehumidification systems

#74
20140013951
2014-01-16

Thermal conditioning for air separation modules

#75
20130233715
2013-09-12

Internal gas and liquid distributor for electrodeionization device

#76
20130125755
2013-05-23

Separation membrane module and fuel vapor processing apparatus incorporating the same

#77
20130098242
2013-04-25

Process for separation of gases

#78
20130019633
2013-01-24

Method for production of a compressed natural gas equivalent from landfill gas and other biogases

#79
20120322646
2012-12-20

Blend polymer gas separation membrane

#80
20120255443
2012-10-11

Oxygen separation module and apparatus

#81
20120000355
2012-01-05

Flexible system to remove carbon dioxide from a feed natural gas

#82
20110305310
2011-12-15

EQUIPMENT AND SYSTEM FOR PROCESSING A GASEOUS MIXTURE BY PERMEATION

#83
20100212501
2010-08-26

Membrane filter element with multiple fiber types

#84
20100107877
2010-05-06

Separation membrane module and fuel vapor processing apparatus incorporating the same

#85
20090249948
2009-10-08

AIR-SEPARATION APPARATUS FOR USE IN HIGH AMBIENT TEMPERATURE ENVIRONMENTS

#86
20070245896
2007-10-25

Modular nitrogen generator

#87
20070125537
2007-06-07

Natural gas treatment process for stimulated well

#88
20060278359
2006-12-14

Method and system for producing inert gas from combustion by-products

#89
20060230935
2006-10-19

Method and system for producing inert gas from combustion by-products

#90
20050092177
2005-05-05

Air separation system and method with modulated warning flow

#91
20050039400
2005-02-24

Hydrogen production process from carbonaceous materials using membrane gasifier

#92
17956933
2023-08-22

Membrane process and system for high recovery of a nonpermeating gas utilizing a sweep gas