ClassID:

30924

B01D2325/14 - CPC Classification

Classification description:

Details relating to properties of membranes Membrane materials having negatively charged functional groups

Recent Application in this class:
#1
20260125290
2026-05-07

Methods and Systems of Nitrate Removal in Aqueous Systems for Improved PFAS Destruction

#2
20250381528
2025-12-18

WATER TREATMENT SEPARATION MEMBRANE WITH IMPROVED NITRATE NITROGEN REMOVAL ABILITY, MANUFACTURING METHOD THEREFOR, AND SEPARATION MEMBRANE MODULE COMPRISING SAME

#3
20250367610
2025-12-04

Block Copolymers Grafted to Porous Polymeric Substrate

#4
20250345754
2025-11-13

DEVICE FOR FILTERING PARTICLES FROM A FLUID AND A METHOD FOR MANUFACTURING THE DEVICE

#5
20250242309
2025-07-31

APPARATUS AND METHOD FOR SEPARATING ORGANIC ACID ALKALI SALTS INTO ORGANIC ACIDS AND ALKALI SALTS BY USING DIFFUSION DIALYSIS

#6
20250170529
2025-05-29

METHODS FOR MAKING CHARGED ULTRAFILTRATION MEMBRANES AND USES THEREOF IN DAIRY APPLICATIONS

#7
20250145503
2025-05-08

METHODS AND SYSTEMS OF NITRATE REMOVAL IN AQUEOUS SYSTEMS FOR IMPROVED PFAS DESTRUCTION

#8
20250144569
2025-05-08

Bipolar Membranes

#9
20250099918
2025-03-27

COATED POROUS FILTER MEMBRANES AND RELATED METHODS

#10
20250099915
2025-03-27

Electro-Pressure Membrane Method for Recovery and Concentration of Lithium from Aqueous Sources

#11
20250091019
2025-03-20

METHOD FOR ASSEMBLING A BIPOLAR MEMBRANE, BIPOLAR MEMBRANE, AND USE OF SAID BIPOLAR MEMBRANE

#12
20250059076
2025-02-20

SYSTEM AND METHOD FOR RECOVERY OF FERTILIZER BUILDING BLOCKS FROM WASTE

#13
20250032989
2025-01-30

ELECTROCHEMICALLY ASSISTED ION EXCHANGE WATER TREATMENT DEVICE HAVING SPECIFIC ARRANGEMENT OF ELECTROCHEMICAL CELLS

#14
20240424451
2024-12-26

COMPOSITIONS AND METHODS FOR SELECTIVE EXTRACTION OF LITHIUM

#15
20240399318
2024-12-05

CERAMIC CATION EXCHANGE MATERIALS

#16
20240382910
2024-11-21

HYDROPHILIC FILTER MEMBRANE WITH PENDANT HYDROPHILIC GROUPS, AND RELATED METHODS OF PREPARATION AND USE

#17
20240367112
2024-11-07

AMPHIPHILIC POLYAMPHOLYTES AND RELATED MEMBRANES

#18
20240350974
2024-10-24

SYSTEMS AND METHODS FOR PROTEIN RECOVERY

#19
20240316500
2024-09-26

CONCENTRATION APPARATUS AND CONCENTRATION METHOD

#20
20240299887
2024-09-12

THIN-FILM COMPOSITE MEMBRANES HAVING IMPROVED ADHESION BETWEEN LAYERS AND USES THEREOF

#21
20240218006
2024-07-04

CONCENTRATION AND DIAFILTRATION OF OLIGONUCLEOTIDES

#22
20240075433
2024-03-07

MEMBRANE WITH IMMOBILIZED ANTICOAGULANT AND PROCESS FOR PRODUCING SAME

#23
20240042393
2024-02-08

METHODS OF MODIFICATION OF ION EXCHANGE MEMBRANES

#24
20230391645
2023-12-07

WATER TREATMENT METHOD, CONTROL APPARATUS, AND WATER TREATMENT SYSTEM

#25
20230383013
2023-11-30

POROUS POLYMERIC CELLULOSE PREPARED VIA CELLULOSE CROSSLINKING

#26
20230364559
2023-11-16

High-flux composite nanofiltration (NF) membrane with electrical double layer (EDL), and preparation method and use thereof

#27
20230338902
2023-10-26

DIFFUSION TRANSFER FUNCTIONALIZED MEMBRANE

#28
20230311075
2023-10-05

Membrane Electrode Assembly with a Selectively Permeable Barrier Layer

#29
20230285907
2023-09-14

SINGLE PIECE-TYPE BIPOLAR FILM ROLL WITH MESH CLOTH SUPPORT AND MANUFACTURING METHOD THEREFOR

#30
20230226499
2023-07-20

Ion-Selective Composite Membrane

#31
20230203248
2023-06-29

PROCESS FOR MANUFACTURING WET STRENGTH RESINS

#32
20230014044
2023-01-19

Electro-pressure membrane method for recovery and concentration of lithium from aqueous sources

#33
20220370998
2022-11-24

Alkaline anion exchange membranes and methods of use thereof

#34
20220288577
2022-09-15

Surface modified membranes

#35
20220212145
2022-07-07

APPARATUS FOR REMOVING FINE PARTICLE AND METHOD FOR REMOVING FINE PARTICLE

#36
20220134287
2022-05-05

Coated porous polymeric membranes

#37
20220127177
2022-04-28

Semiconductor process wastewater treatment system and semiconductor process wastewater treatment method using the same

#38
20220120649
2022-04-21

LIGAND-FUNCTIONALIZED SUBSTRATES WITH ENHANCED BINDING CAPACITY

#39
20220097008
2022-03-31

CHARGED ISOPOROUS MATERIALS FOR ELECTROSTATIC SEPARATIONS

#40
20220080364
2022-03-17

Method for biological or biomimetic channel-based membrane fabrications using layer-by-layer structure

#41
20220062829
2022-03-03

Monovalent Selective Cation Exchange Membrane

#42
20220041765
2022-02-10

Fluorosulfonyl group-containing compound, fluorosulfonyl group-containing monomer, and their production methods

#43
20220032282
2022-02-03

Grafted polysulfone membranes

#44
20220023805
2022-01-27

Ultrafiltration/nanofiltration membrane with tunable pore size

#45
20210346881
2021-11-11

Membranes Suitable for Detecting, Filtering and/or Purifying Biomolecules and Metal-Ions

#46
20210340343
2021-11-04

Ion exchange membrane through UV initiation polymerization

#47
20210260534
2021-08-26

Ceramic cation exchange materials

#48
20210178342
2021-06-17

REMOVING METAL IONS WITH A MEMBRANE BASED ON ANIONIC POLYARYLENE ETHERSULFONE AND A CATIONIC POLYMER WITH AMINO GROUPS

#49
20210178341
2021-06-17

Ultrafiltration membranes for dairy protein separation

#50
20210178339
2021-06-17

Porous membrane encapsulated pellet and method for its preparation

#51
20210171665
2021-06-10

Porous polymeric cellulose prepared via cellulose crosslinking

#52
20210121828
2021-04-29

A POLYELECTROLYTE-BASED SACRIFICIAL PROTECTIVE LAYER FOR FOULING CONTROL IN DESALINATION AND WATER FILTRATION

#53
20210046428
2021-02-18

FUNCTIONALISED MIXED MATRIX MEMBRANES AND METHOD OF PRODUCTION

#54
20210031152
2021-02-04

Functionalized copolymers and use thereof

#55
20210031148
2021-02-04

SYSTEMS, DEVICES, AND METHODS FOR BODILY FLUID SEPARATION MATERIALS

#56
20200398230
2020-12-24

Functional fibrous membrane, method for manufacturing the same, filter comprising the same

#57
20200384421
2020-12-10

Ceramic cation exchange materials

#58
20200368692
2020-11-26

Filtering device, purification device, and method for manufacturing chemical liquid

#59
20200362107
2020-11-19

Sulfonated poly(arylene ether) membranes with high monovalent salt rejection even in the presence of mixed salt feeds that contain multivalent salts

#60
20200353423
2020-11-12

Polymer Material, Membrane and Coating as Well as Preparation Methods and Applications Thereof

#61
20200209123
2020-07-02

Ligand-functionalized substrates with enhanced binding capacity

#62
20200206691
2020-07-02

Coated porous polymeric membranes

#63
20200190233
2020-06-18

Fluorosulfonyl group or sulfonic acid group-containing polymer, its production method and its application

#64
20200188861
2020-06-18

Composite semipermeable membrane and method for producing composite semipermeable membrane

#65
20200171442
2020-06-04

HYDROPHILIC FILTER MEMBRANE WITH PENDANT HYDROPHILIC GROUPS, AND RELATED METHODS OF PREPARATION AND USE

#66
20200164320
2020-05-28

Polyelectrolyte multilayer (PEM) membranes and their use

#67
20200147557
2020-05-14

Diffusion transfer functionalized membrane

#68
20200139306
2020-05-07

Systems And Methods For Liquid Purification

#69
20200078736
2020-03-12

Nanostructured polyelectrolytes for ion-selective membranes

#70
20200070106
2020-03-05

DIALYSIS MEMBRANE AND METHOD FOR ITS PRODUCTION

#71
20200023318
2020-01-23

Systems, devices, and methods for bodily fluid separation materials

#72
20190329188
2019-10-31

MEMBRANE FOR THE ADSORPTION OF BACTERIA

#73
20190285523
2019-09-19

Ligand-functionalized substrates with enhanced binding capacity

#74
20190283388
2019-09-19

Layer-by-layer assembly of graphene oxide membranes via electrostatic interaction and eludication of water and solute transport mechanisms

#75
20190200631
2019-07-04

Durable asymmetric composite membranes and modified substrates used in their preparation

#76
20190175816
2019-06-13

Blood processing filter

#77
20190169416
2019-06-06

Fabricating ionic/polyimtde membranes

#78
20190134570
2019-05-09

Nanofiber-based bipolar membranes, fabricating methods and applications of same

#79
20190076791
2019-03-14

Composite separation membrane

#80
20190062458
2019-02-28

Porous polymeric cellulose prepared via cellulose crosslinking

#81
20190055138
2019-02-21

Functionalized surfaces for the destruction of pathogens and organics

#82
20190046923
2019-02-14

Zeolite-like metal-organic framework membrane

#83
20190039030
2019-02-07

Charged isoporous materials for electrostatic separations

#84
20190022602
2019-01-24

Layered semipermeable membrane

#85
20190016851
2019-01-17

Poly(phenylene) and m-Terphenyl as protecting groups for benzimidazolium hydroxides

#86
20180326363
2018-11-15

Homogeneous cation-exchange composite membrane having excellent chemical resistance and method for producing the same

#87
20180326359
2018-11-15

Layered Membrane and Methods of Preparation Thereof

#88
20180318775
2018-11-08

Aqueous phase separation method

#89
20180290109
2018-10-11

Grafted ultra high molecular weight polyethylene microporous membranes

#90
20180272274
2018-09-27

Separation membrane for olefin separation and olefin separation method using the same

#91
20180264416
2018-09-20

Hydrophilic graphitic material

#92
20180251592
2018-09-06

Block polymer and polymer electrolyte membrane including same

#93
20180241061
2018-08-23

Composite polymer electrolyte membrane for fuel cell, and method of manufacturing the same

#94
20180233733
2018-08-16

Methods and apparatus for controlling electrodeposition using surface charge properties

#95
20180217035
2018-08-02

Ligand-functionalized substrates with enhanced binding capacity

#96
20180186142
2018-07-05

Layer-by-layer assembly of graphene oxide membranes via electrostatic interaction and eludication of water and solute transport mechanisms

#97
20180185835
2018-07-05

Grafted polysulfone membranes

#98
20180178168
2018-06-28

Anti-fouling coatings with star polymers for filtration membranes

#99
20180133658
2018-05-17

ADSORPTIVE MEMBRANE

#100
20180104656
2018-04-19

Systems, devices, and methods for bodily fluid separation materials

#101
20180071693
2018-03-15

Filtration membranes, and related nano and/or micro fibers, composites, methods and systems

#102
20180036687
2018-02-08

Chlorine resistant polyelectrolyte multilayer membranes for desalination

#103
20170361281
2017-12-21

Filtration membranes with functionalized star polymers

#104
20170341032
2017-11-30

Method of forming an asymmetric membrane

#105
20170341031
2017-11-30

METHOD OF FORMING AN ASYMMETRIC MEMBRANE

#106
20170296985
2017-10-19

Separation membrane, separation membrane element and separation membrane module

#107
20170279142
2017-09-28

Membrane

#108
20170232405
2017-08-17

Dialysis membrane and method for its production

#109
20170232404
2017-08-17

Electroosmotic membrane

#110
20170210884
2017-07-27

Polymer resin composition and vinylidene fluoride-based polymer molded product

#111
20170189865
2017-07-06

Filtration material

#112
20170189861
2017-07-06

Polymer electrolyte membrane containing nitrate for sulfur hexafluoride separation

#113
20170080380
2017-03-23

Gas separation process

#114
20170056828
2017-03-02

Membrane stacks

#115
20170056826
2017-03-02

Membrane stacks

#116
20170037206
2017-02-09

Curable compositions and membranes

#117
20170005354
2017-01-05

Polymer electrolyte film

#118
20160369017
2016-12-22

Curable composition, polymer functional cured product, water-soluble acrylamide compound, and method for manufacturing same

#119
20160317974
2016-11-03

Method for preparing a resin-treated microporous membrane

#120
20160296883
2016-10-13

Zeolite-like metal-organic framework membrane

#121
20160236154
2016-08-18

Anti-fouling coatings with star polymers for filtration membranes

#122
20160231208
2016-08-11

Ligand functionalized substrates with enhanced binding capacity

#123
20160196888
2016-07-07

Electrochemical ion separation in molten salts

#124
20160137797
2016-05-19

Curable compositions and membranes

#125
20160136586
2016-05-19

MEMBRANE AND METHOD OF MANUFACTURING THE SAME

#126
20160096148
2016-04-07

Ceramic whole blood hollow fiber membrane filter medium and use thereof for separating blood plasma/serum from whole blood

#127
20160074569
2016-03-17

Polymeric whole blood hollow fiber membrane filter medium and use thereof for separating blood plasma/serum from whole blood

#128
20160059190
2016-03-03

LIQUID FILTERING STRUCTURE

#129
20160051943
2016-02-25

NEGATIVELY CHARGED POROUS MEDIUM FOR REMOVING PROTEIN AGGREGATES

#130
20160008769
2016-01-14

Filtration membranes with functionalized star polymers

#131
20160001238
2016-01-07

Polymer functional film and method for producing same

#132
20150353696
2015-12-10

Functional polymer membrane, manufacturing method therefor, ion exchange membrane and proton conductive membrane equipped with functional polymer membrane, and ion exchange device

#133
20150290637
2015-10-15

Block copolymers, their manufacture and their use

#134
20150258506
2015-09-17

Layer-by-layer assembly of graphene oxide membranes via electrostatic interaction and eludication of water and solute transport mechanisms

#135
20150246324
2015-09-03

Charged hollow fiber membrane having hexagonal voids

#136
20150246323
2015-09-03

Charged porous polymeric membrane with high void volume

#137
20150246322
2015-09-03

Porous polymeric membrane with high void volume

#138
20150209736
2015-07-30

Composite separation membrane

#139
20150148482
2015-05-28

Method for producing aqueous fluorine-containing polymer dispersing element, and purified aqueous fluorine-containing polymer dispersing element

#140
20150076054
2015-03-19

Systems, devices, and methods for bodily fluid separation materials

#141
20150068978
2015-03-12

ENHANCMENT OF MEMBRANE ROBUSTNESS BY TREATMENT WITH IONIC MATERIALS

#142
20150068973
2015-03-12

Method for preparing a membrane from fibril cellulose and fibril, cellulose membrane

#143
20140311968
2014-10-23

Preparation method of perfluorinated polymer hollow fiber membrane

#144
20140305863
2014-10-16

Composite membranes

#145
20140262762
2014-09-18

Facilitated olefin transport membrane including aluminium salt

#146
20140166489
2014-06-19

Nanoengineered field induced charge separation membranes manufacture thereof

#147
20140014518
2014-01-16

Active components and membranes for electrochemical compression

#148
20130313182
2013-11-28

Separation membrane and water treatment device including the same

#149
20130277318
2013-10-24

Ultrafiltration membranes fabricated from sulfonated polyphenylenesulfones

#150
20130240355
2013-09-19

FUNCTIONALIZATION OF GRAPHENE HOLES FOR DEIONIZATION

#151
20130225764
2013-08-29

Fluoropolymer dispersion and process for producing fluoropolymer dispersion

#152
20130184428
2013-07-18

Sulphur-containing triazine monomer that can be used for the synthesis of a polymer membrane for a fuel cell

#153
20130146539
2013-06-13

Membrane with localized asymmetries

#154
20130134081
2013-05-30

Hybrid porous structure, method of preparing hybrid porous structure, separation membrane including hybrid porous structure, and water treatment device including membrane

#155
20130102213
2013-04-25

Polyoxyalkyleneamine modified sulfonated block copolymers, their preparation and their use

#156
20130056415
2013-03-07

NEGATIVELY CHARGED POROUS MEDIUM FOR REMOVING PROTEIN AGGREGATES

#157
20130032530
2013-02-07

Composite semipermeable membrane

#158
20120267337
2012-10-25

Ultrathin porous nanoscale membranes, methods of making, and uses thereof

#159
20120264948
2012-10-18

MEMBRANE SEPARATION AND PURIFICATION OF MONATIN

#160
20120252912
2012-10-04

Process for producing microporous polymeric object, and microporous polymeric object and separation membrane

#161
20120074068
2012-03-29

Polysaccharide matrix having a grafted polymer, method for producing the same and use thereof

#162
20120031842
2012-02-09

METHOD FOR MODIFYING COMPOSITE MEMBRANES FOR LIQUID SEPARATIONS

#163
20110240463
2011-10-06

Bipolar membrane and method of manufacturing the same

#164
20110236563
2011-09-29

Method for producing a proton-conducting membrane

#165
20110229797
2011-09-22

Sulfonated-Perfluorocyclobutane Polyelectrolyte Membranes for Fuel Cells

#166
20110186512
2011-08-04

PROCESS FOR DISINFECTING A FILTRATION WORKS FOR PRETREATMENT OF SALTWATER, AND INSTALLATION FOR THE IMPLEMENTATION THEREOF

#167
20110163029
2011-07-07

Method for substance separation using a cellulose hydrate membrane in size exclusion chromatography

#168
20110147308
2011-06-23

Charged Porous Polymeric Membranes and Their Preparation

#169
20110147292
2011-06-23

Cellulose hydrate membrane, method for the production thereof, and use thereof

#170
20110139708
2011-06-16

Composite semipermeable membrane and manufacturing method therefor

#171
20110132762
2011-06-09

Nanoengineered field induced charge separation membranes and methods of manufacture thereof

#172
20110120947
2011-05-26

Hydrophobic cellulose membrane, method for the production thereof, and use of same in hydrophobic interaction chromatography

#173
20110094960
2011-04-28

Method of forming a rewettable asymmetric membrane

#174
20110091698
2011-04-21

Method of forming an asymmetric membrane

#175
20110053043
2011-03-03

Nanostructured polymer membranes for proton conduction

#176
20100313752
2010-12-16

GAS SEPARATION MEMBRANES AND PROCESSES FOR THE MANUFACTURE THEREOF

#177
20100304273
2010-12-02

Proton conducting membranes for fuel cells having a proton gradient and methods for preparing said membranes

#178
20100284880
2010-11-11

Proton conducting membrane and method for producing proton conducting membrane

#179
20100261799
2010-10-14

Stable and compatible polymer blends

#180
20100224066
2010-09-09

Drying substances, preparation and use thereof

#181
20100206811
2010-08-19

POLYMERIC MEMBRANES INCORPORATING NANOTUBES

#182
20100167100
2010-07-01

COMPOSITE MEMBRANE AND METHOD FOR MAKING

#183
20100158983
2010-06-24

METHOD FOR INCREASING THE PERMEABILITY OF POLYMER FILM

#184
20100151352
2010-06-17

Composites and Composite Membranes

#185
20100096327
2010-04-22

POLYMER COATINGS THAT RESIST ADSORPTION OF PROTEINS

#186
20100096066
2010-04-22

MEMBRANE STRUCTURE AND METHOD OF MAKING

#187
20100089820
2010-04-15

Dialysis membrane with improved removal of middle molecules

#188
20100059440
2010-03-11

Cross-linked cellulose membranes

#189
20100047551
2010-02-25

Composite materials comprising supported porous gels containing reactive functional groups

#190
20100044316
2010-02-25

Composite materials comprising supported porous gels

#191
20100036009
2010-02-11

Process for producing microporous polymeric object, and microporous polymeric object and separation membrane

#192
20100022740
2010-01-28

Process for producing glycolic acid

#193
20100006496
2010-01-14

Water separation membrane

#194
20090289012
2009-11-26

System and method for recycling using nanoceramics

#195
20090206038
2009-08-20

Use of a colloidal suspension of a cationic polymer to treat a support for medical use

#196
20090184047
2009-07-23

Functionalized nanopore membranes and related methods of use

#197
20090123751
2009-05-14

Method for Producing Fine Particles of Salt, Hydroxide or Oxide, and Fine Particles of Salt, Hydroxide or Oxide Produced by Such Method

#198
20090123641
2009-05-14

Reinforced ion-conductive membranes

#199
20090053576
2009-02-26

Fluorochloro ionomers

#200
20090035552
2009-02-05

Composite materials comprising supported porous gels containing reactive functional groups

#201
20090032466
2009-02-05

Agent for increasing rejection with a permeable membrane, process for increasing the rejection, permeable membrane and process for water treatment

#202
20090032463
2009-02-05

Method for separating a substance from a fluid

#203
20090029438
2009-01-29

Composite material comprising supported porous gel containing functional groups and method of separating substances

#204
20090017360
2009-01-15

Oligomeric and polymeric aromatic phosphonic acids, their blends, processes for preparing them and uses as polyelectrolytes

#205
20090008328
2009-01-08

Separating substances with supported porous gels containing metal-affinity ligands complexed with metal ions

#206
20080314831
2008-12-25

Absorbing biological substances from liquid with supported porous gels containing binding sites

#207
20080312416
2008-12-18

Composite materials comprising supported porous gels containing metal-affinity ligands

#208
20080290022
2008-11-27

Crosslinked polymer film bearing ionic groupings

#209
20080261102
2008-10-23

Sulfonated-perfluorocyclobutane polyelectrolyte membranes for fuel cells

#210
20080223785
2008-09-18

Ionic Polymer Membranes

#211
20080179188
2008-07-31

Methods, compositions and devices, including electroosmotic pumps, comprising coated porous surfaces

#212
20080095925
2008-04-24

Method for producing a membrane electrode including forming the membrane in situ

#213
20080000828
2008-01-03

High-flux dialysis membrane with an improved separation behaviour

#214
20070248503
2007-10-25

Conducting ceramics for electrochemical systems

#215
20070227905
2007-10-04

Electrolytic Deposition Treatment Apparatus and Method

#216
20070191499
2007-08-16

Functionalized inorganic films for ion conduction

#217
20070163950
2007-07-19

High-flux dialysis membrane with improved separation behaviour

#218
20070163949
2007-07-19

Dialysis membrane having improved ability for removal of middle molecules

#219
20070131609
2007-06-14

Membrane structure and method of making

#220
20070128425
2007-06-07

Reinforced ion-conductive membranes

#221
20070122676
2007-05-31

Polymer electrolyte membrane for fuel cell and fuel cell system including the same

#222
20070111048
2007-05-17

Conducting ceramics for electrochemical systems

#223
20070099054
2007-05-03

Sulfonated-perfluorocyclobutane polyelectrolyte membranes for fuel cells

#224
20070023957
2007-02-01

Assembly of free-standing films using a layer-by-layer process

#225
20060278580
2006-12-14

Ultrathin porous nanoscale membranes, methods of making, and uses thereof

#226
20060263884
2006-11-23

Use of passageways through porous membranes

#227
20060231484
2006-10-19

Composites and composite membranes

#228
20060204654
2006-09-14

Method of making a composite membrane

#229
20060151374
2006-07-13

Charged membrane

#230
20050228127
2005-10-13

Fluoropolymer dispersion and process for producing fluoropolymer dispersion

#231
20050139537
2005-06-30

Negatively charged membrane

#232
20050019302
2005-01-27

Polymer based permeable membrane for removal of ions