ClassID:

30914

B01D2325/023 - CPC Classification

Classification description:

Details relating to properties of membranes; Details relating to pores or porosity of the membranes; Asymmetric membranes Dense layer within the membrane

Recent Application in this class:
#1
20260138096
2026-05-21

SYSTEMS AND METHODS FOR TANGENTIAL FLOW DEPTH FILTRATION

#2
20260115669
2026-04-30

HOLLOW FIBER MEMBRANE, HOLLOW FIBER MEMBRANE UNIT, HOLLOW FIBER MEMBRANE MODULE, AND HUMIDITY CONTROL MACHINE

#3
20260070024
2026-03-12

Asymmetric Hollow Fiber Membrane

#4
20260022035
2026-01-22

METHOD FOR OPERATING REVERSE OSMOSIS MEMBRANE DEVICE

#5
20250256247
2025-08-14

COMPOSITE SEMIPERMEABLE MEMBRANE AND METHOD FOR PRODUCING COMPOSITE SEMIPERMEABLE MEMBRANE

#6
20250188233
2025-06-12

MULTIBLOCK COPOLYMER FILMS, METHODS OF MAKING SAME, AND USES THEREOF

#7
20250186950
2025-06-12

PROCESSES FOR THE PREPARATION OF POLYMERIC MEMBRANES CONTAINING IONIC LIQUIDS AND THEIR DERIVATIVES FOR THE SEQUESTRATION OF CO2 FROM NATURAL GAS BY GASEOUS PERMEATION AND POLYMERIC MEMBRANES OBTAINED BY THESE PROCESSES

#8
20250083110
2025-03-13

MICRO-SMOOTH POROUS HYBRID MATRIX MEMBRANE STRUCTURAL SUPPORT FOR A MEMBRANE SEPARATOR

#9
20240408552
2024-12-12

METHOD FOR PREPARING A NOVEL GUANIDINE-BASED COMPOSITE NANOFILTRATION FLAT-SHEET MEMBRANE

#10
20240325985
2024-10-03

METHODS FOR MANUFACTURING HOLLOW FIBER CARBON MEMBRANES

#11
20240269618
2024-08-15

Forward Osmosis Membrane and Forward Osmosis Membrane Module Including Same

#12
20230277980
2023-09-07

High free volume membrane for gas separation

#13
20220411596
2022-12-29

Multiblock copolymer films, methods of making same, and uses thereof

#14
20220323910
2022-10-13

SYSTEMS AND METHODS FOR TANGENTIAL FLOW DEPTH FILTRATION

#15
20220212139
2022-07-07

High free volume membrane for gas separation

#16
20220176321
2022-06-09

System and Process for Hybrid Membrane Distillation-Pervaporation

#17
20220080365
2022-03-17

Carbon membrane for fluid separation use

#18
20220062816
2022-03-03

Asymmetric hollow fiber membranes and methods of making and using the same

#19
20220040644
2022-02-10

Hydrogen purification using molecular dynamics

#20
20210394125
2021-12-23

Crosslinked hollow-fibre membranes and new process for manufacturing the same

#21
20210370238
2021-12-02

Hydrophilic porous membrane and method for producing hydrophilic porous membrane

#22
20210362097
2021-11-25

Separation membrane

#23
20210346849
2021-11-11

Porous hollow fiber membrane

#24
20210332486
2021-10-28

Asymmetric electrolyte membrane, membrane electrode assembly comprising the same, water electrolysis apparatus comprising the same and method for manufacturing the same

#25
20210322932
2021-10-21

Zeolite membrane composite, method of producing zeolite membrane composite, and separation method

#26
20210283550
2021-09-16

Gas separation membrane module

#27
20210260538
2021-08-26

Method for manufacturing porous membrane and porous membrane

#28
20210236998
2021-08-05

A CROSS-LINKED POLYMERIC MEMBRANE

#29
20210213394
2021-07-15

Porous hollow fiber membrane

#30
20210170328
2021-06-10

Hollow Fiber Membrane For Use in an Anesthetic Circuit

#31
20210106953
2021-04-15

Porous polymeric membrane and related filters and methods

#32
20210101119
2021-04-08

COMPOSITE HOLLOW FIBER MEMBRANE, AND METHOD FOR PRODUCING COMPOSITE HOLLOW FIBER MEMBRANE

#33
20210093768
2021-04-01

HIGHLY-PERMEABLE DENSE HOLLOW FIBER MEMBRANE FOR BLOOD OXYGENATION

#34
20210086139
2021-03-25

Hydrophilic porous membrane and method for producing hydrophilic porous membrane

#35
20210039053
2021-02-11

Fluorine-based resin porous membrane and method for preparing the same

#36
20200391161
2020-12-17

FLUID SEPARATION MEMBRANE

#37
20200360864
2020-11-19

Hollow fiber membrane and manufacturing method thereof

#38
20200339770
2020-10-29

Multiblock copolymer films, methods of making same, and uses thereof

#39
20200289991
2020-09-17

POROUS HOLLOW FIBER MEMBRANE AND METHOD FOR PRODUCING SAME

#40
20200129933
2020-04-30

Polyamide flat sheet membranes with microporous surface structure for nanoparticle retention

#41
20200070099
2020-03-05

Cellulose acetate-based asymmetric hollow fiber membrane

#42
20200001247
2020-01-02

Asymmetric membranes

#43
20190241815
2019-08-08

Use of semipermeable membranes in cracking coils

#44
20190176090
2019-06-13

Hybrid polymeric hollow fiber membrane, hybrid carbon molecular sieve hollow fiber membrane, and processes for preparing the same

#45
20190091626
2019-03-28

Hollow fiber membrane for use in an anesthetic circuit

#46
20190076790
2019-03-14

Porous membrane, porous membrane module, method for producing porous membrane, method for producing clarified liquid, and method for producing beer

#47
20190060841
2019-02-28

High selectivity facilitated transport membrane comprising polyethersulfone/polyethylene oxide-polysilsesquioxane blend membrane for olefin/paraffin separations

#48
20190060787
2019-02-28

Hollow-fiber membrane for fuel degassing

#49
20190046931
2019-02-14

Separation membrane

#50
20180333682
2018-11-22

ASYMMETRICALLY POROUS ION EXCHANGE MEMBRANES AND THEIR METHOD OF MANUFACTURE

#51
20180333675
2018-11-22

Co-cast thin film composite flat sheet membranes for gas separations and olefin/paraffin separations

#52
20180169587
2018-06-21

Method for preparing an asymmetric membrane

#53
20180085713
2018-03-29

Hollow fiber membrane and method of preparing the same

#54
20180021741
2018-01-25

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

#55
20180001268
2018-01-04

Stable facilitated transport membranes for olefin/paraffin separations

#56
20170369794
2017-12-28

PROCESS FOR PREPARING A BASE OIL HAVING A REDUCED CLOUD POINT

#57
20170312700
2017-11-02

Asymmetric membranes

#58
20170304780
2017-10-26

HOLLOW FIBER FILTRATION MEMBRANE

#59
20170296985
2017-10-19

Separation membrane, separation membrane element and separation membrane module

#60
20170296981
2017-10-19

Gas separation membranes with intermixed layers

#61
20170266625
2017-09-21

Composite hollow fiber membrane module and manufacturing method therefor

#62
20170225127
2017-08-10

Method of making reaction induced phase separation membranes and uses thereof

#63
20170203276
2017-07-20

Vinylidene chloride copolymer-based carbon molecular sieve adsorbent compositions and processes therefor

#64
20170028360
2017-02-02

Virus removal membrane

#65
20170022337
2017-01-26

Multiblock copolymer films, methods of making same, and uses thereof

#66
20170021311
2017-01-26

Skinned, asymmetric poly(phenylene ether) co-polymer membrane; gas separation unit, and preparation method thereof

#67
20160096150
2016-04-07

Composite oxygen ion transport membrane

#68
20160001221
2016-01-07

Composite oxygen transport membrane

#69
20150343389
2015-12-03

Curable compositions and membranes

#70
20150298071
2015-10-22

Composite gas separation membranes with dialkysiloxane intermediate layer

#71
20150217225
2015-08-06

Polyimide-based macromolecular compound and gas-separation asymmetrical hollow-fibre membrane comprising the same

#72
20150209733
2015-07-30

Process for preparing membranes

#73
20150165369
2015-06-18

Process for preparing membranes

#74
20150143995
2015-05-28

Gas separation membranes with intermixed layers

#75
20140311346
2014-10-23

Composite oxygen transport membrane

#76
20140217012
2014-08-07

Multiblock copolymer films, methods of making same, and uses thereof

#77
20130156978
2013-06-20

Composite oxygen transport membrane

#78
20130056420
2013-03-07

Multilayer microfiltration membrane

#79
20120310018
2012-12-06

Zeolitic imidazolate framework membranes and methods of making and using same for separation of C2− and C3+ hydrocarbons and separation of propylene and propane mixtures

#80
20120132590
2012-05-31

Method for fabrication of elastomeric asymmetric membranes from hydrophobic polymers

#81
20120067210
2012-03-22

High temperature gas processing system and method for making the same

#82
20110303092
2011-12-15

High permeance sulfur tolerant Pd/Cu alloy membranes

#83
20110259816
2011-10-27

Porous hollow fiber membrane and a porous hollow fiber membrane for the treatment of a protein-containing liquid

#84
20110107911
2011-05-12

Membrane And Process For Steam Separation, Purification And Recovery

#85
20100230843
2010-09-16

Microfiltration membrane with improved filtration properties

#86
20100206811
2010-08-19

POLYMERIC MEMBRANES INCORPORATING NANOTUBES

#87
20100116131
2010-05-13

Method for manufacturing polyimide asymmetric membrane, and polyimide asymmetric membrane

#88
20100111761
2010-05-06

Process of synthesis asymmetric polyurethane based membranes with hemocompatibility characteristics and membranes obtained by said process

#89
20100096066
2010-04-22

MEMBRANE STRUCTURE AND METHOD OF MAKING

#90
20100071556
2010-03-25

Stable supported Pd-alloy membranes

#91
20100018394
2010-01-28

Hollow organic/inorganic composite fibers, sintered fibers, methods of making such fibers, gas separation modules incorporating such fibers, and methods of using such modules

#92
20090269656
2009-10-29

Microporous polyethylene membrane, its production method, and battery separator

#93
20090241496
2009-10-01

Process for producing a nanoporous layer of nanoparticles and layer thus obtained

#94
20090214844
2009-08-27

Hydrogen transport membrane fabrication method

#95
20090184037
2009-07-23

MEMBRANE STRUCTURE FOR GAS SEPARATION

#96
20090117455
2009-05-07

Multi-layer, microporous polyethylene membrane, its production method, and battery separator

#97
20090098449
2009-04-16

Microporous polyolefin membrane, and method of producing the same

#98
20090007532
2009-01-08

Composite ceramic body, method of manufacturing the same and ceramic filter assembly

#99
20080217240
2008-09-11

ORIENTED ZEOLITE FILM-PROVIDED STRUCTURE

#100
20080197072
2008-08-21

Microfiltration Membrane With Improved Filtration Properties

#101
20080114087
2008-05-15

Method for fabrication of elastomeric asymmetric membranes from hydrophobic polymers

#102
20070262017
2007-11-15

Composite porous membrane and method for producing the same

#103
20070243324
2007-10-18

Composite porous membrane and method for producing the same

#104
20070131609
2007-06-14

Membrane structure and method of making

#105
20070110991
2007-05-17

Hydrogen transport membrane fabrication method

#106
20070080108
2007-04-12

Hollow fiber membrane for blood purification and blood purification apparatus using the same

#107
20060231485
2006-10-19

Method for manufacturing polyimide asymmetric membrane, and polyimide asymmetric membrane

#108
20060208377
2006-09-21

Method of making a ceramic composite

#109
20050205488
2005-09-22

Composite porous membrane and method for producing the same

#110
20050155926
2005-07-21

System and method for synthesizing a polymer membrane

#111
20050145561
2005-07-07

Porous membrane

#112
20050098913
2005-05-12

Microporous polyolefin membrane, and method of producing the same