Patents-Review.com
ClassID:

30233 ⎘

B01D2239/1258 - CPC Classification

Classification description:

Aspects relating to filtering material for liquid or gaseous fluids; Special parameters characterising the filtering material Permeability

Recent Application in this class:
#1
20260126021
2026-05-07

FILTER MEDIUM AND METHOD OF PRODUCTION THEREOF

 #2
20260124566
2026-05-07

PULSE FILTER

 #3
20260115638
2026-04-30

ELECTRET-CONTAINING FILTER MEDIA

 #4
20260108833
2026-04-23

MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA

 #5
20260097341
2026-04-09

DUAL-LAYER GAS FILTERS AND SYSTEMS AND METHODS FOR MAKING THE SAME

 #6
20260042041
2026-02-12

FILTER MEDIA INCLUDING NONWOVEN FIBER WEBS COMPRISING NANOFIBERS, AND RELATED METHODS

 #7
20250387738
2025-12-25

COMPOSITE MEDIA FOR FUEL STREAMS

 #8
20250325929
2025-10-23

FILTER MEDIA FOR WATER FILTRATION

 #9
20250281876
2025-09-11

DECONTAMINATING MATERIALS AND METHODS OF MAKING AND USING SAME

 #10
20250281860
2025-09-11

FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF

 #11
20250262582
2025-08-21

FILTRATION MEDIA

 #12
20250261795
2025-08-21

METHOD OF FILTERING HIGH TEMPERATURE EDIBLE COOKING OIL

 #13
20250255435
2025-08-14

Method of Filtering Edible Cooking Oil

 #14
20250249384
2025-08-07

MULTILAYERED MEDIA WITH IRREGULAR STRUCTURE AND/OR REVERSIBLY STRETCHABLE LAYERS

 #15
20250248566
2025-08-07

High Temperature Filter For Edible Cooking Oil

 #16
20250222379
2025-07-10

COALESCER FILTER MEDIA

 #17
20250186919
2025-06-12

METHOD FOR MANUFACTURING A METALLIC FUNCTIONAL PART DELIMITING A POROUS FILTERING MEDIUM, USING AN ADDITIVE MANUFACTURING METHOD, AND OBTAINED FUNCTIONAL PART

 #18
20250186918
2025-06-12

METHOD FOR MANUFACTURING A METALLIC FUNCTIONAL PART DELIMITING A POROUS FILTERING MEDIUM, USING AN ADDITIVE MANUFACTURING METHOD, AND OBTAINED FUNCTIONAL PART

 #19
20250153079
2025-05-15

FILTER MEDIA, ELEMENTS, AND METHODS

 #20
20250100008
2025-03-27

NANOPARTICLE FEED SYSTEMS FOR MANUFACTURING FILTER MEDIA

 #21
20250090985
2025-03-20

ULTRASONICALLY BONDED ELECTRET FILTER MEDIA

 #22
20250018350
2025-01-16

AIR-PERMEABLE FILTER AND AIR-PERMEABLE MEMBER

 #23
20250001397
2025-01-02

PORUS BLOCK ARTICLE

 #24
20250001339
2025-01-02

AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT

 #25
20240408523
2024-12-12

FILTER MATERIAL FOR AIR FILTER AND METHOD FOR PRODUCING FILTER MATERIAL

 #26
20240400280
2024-12-05

THERMOPLASTIC-IMPREGNATED CELLULOSIC NONWOVEN AS A COMPOSTABLE FILTER MATERIAL FOR LIQUIDS

 #27
20240390829
2024-11-28

HIGH EFFICIENCY FILTER MEDIA, MEDIA PACKS, AND FILTER ELEMENTS

 #28
20240367078
2024-11-07

A FILTER AND A METHOD OF MAKING A FILTER

 #29
20240335782
2024-10-10

CORRUGATED FILTER MEDIA

 #30
20240278172
2024-08-22

ELECTROSPUN POLYMERIC NANOFIBER FILTER MATERIAL AND DEVICES

 #31
20240238709
2024-07-18

FILTER

 #32
20240229312
2024-07-11

HIGH TEMPERATURE TREATED MEDIA

 #33
20240216844
2024-07-04

Composite filtering medium and method for production thereof

 #34
20240207764
2024-06-27

HIGH PERFORMANCE FILTER MEDIA

 #35
20240149196
2024-05-09

AIR FILTER MEDIUM AND AIR FILTER PRODUCT

 #36
20240139662
2024-05-02

Filter media, elements, and methods

 #37
20240133092
2024-04-25

HIGH TEMPERATURE TREATED MEDIA

 #38
20240115981
2024-04-11

Biodegradable cellulose-based filter media and facial masks including the same

 #39
20240084103
2024-03-14

POLYPROPYLENE COMPOSITION CONTAINING A NEW CHARGE-STABILIZING AGENT FOR ELECTRET MELT BLOWN WEBS

 #40
20240066449
2024-02-29

BONDING MULTIPLE LAYERS OF FILTRATION MATERIAL

 #41
20240040716
2024-02-01

Pressure equalising device and housing comprising the pressure equalising device

 #42
20230398478
2023-12-14

FILTER MEDIUM COMPRISING A NONWOVEN ELECTRET

 #43
20230372858
2023-11-23

AIR FILTER MEDIUM, FILTER PLEAT PACK, AND AIR FILTER UNIT

 #44
20230356124
2023-11-09

INTAKE FILTER FOR VEHICLE AND MANUFACTURING METHOD THEREOF

 #45
20230321575
2023-10-12

FILTRATION MEDIA INCORPORATING NANOPARTICLES AND LARGE LINEAR DENSITY FIBERS

 #46
20230321571
2023-10-12

DUAL-LAYER GAS FILTERS AND SYSTEMS AND METHODS FOR MAKING THE SAME

 #47
20230321568
2023-10-12

FILTRATION MEDIA AND FILTERS

 #48
20230285883
2023-09-14

Soy based filtration system

 #49
20230233969
2023-07-27

COMPOSITE MEDIA FOR FUEL STREAMS

 #50
20230233967
2023-07-27

AIR FILTRATION MATERIAL, FILTERS COMPRISING THE SAME AND METHOD FOR MANUFACTURING THE SAME

 #51
20230226473
2023-07-20

DEPTH FILTER

 #52
20230158430
2023-05-25

HIGH EFFICIENCY SYNTHETIC FILTER MEDIA

 #53
20230158428
2023-05-25

COMPOSITE NON-WOVEN FABRIC AND ARTICLE COMPRISING SAME

 #54
20230124690
2023-04-20

HIGH EFFICIENCY FILTER MEDIA

 #55
20230108099
2023-04-06

BIODEGRADABLE FILTERS

 #56
20230097915
2023-03-30

High Temperature Filter For Edible Cooking Oil And Method Of Use

 #57
20230026227
2023-01-26

SPUNBOND NON-WOVEN FABRIC, FILTER LAMINATED FILTER MATERIAL, FILTER MATERIAL FOR PLEATED FILTER FOR DUST COLLECTOR, PLEATED FILTER FOR DUST COLLECTOR, AND MEDIUM AIR VOLUME PULSE-JET TYPE DUST COLLECTOR

 #58
20230025947
2023-01-26

STRETCHED POROUS POLYTETRAFLUOROETHYLENE MEMBRANE, AIR-PERMEABLE MEDIUM USING THE SAME, AND FILTER MEMBER USING THE SAME

 #59
20230025717
2023-01-26

Filter media with irregular structure

 #60
20230022704
2023-01-26

HOT EXTRACTION PAPER

 #61
20230019449
2023-01-19

STRETCHED POROUS POLYTETRAFLUOROETHYLENE MEMBRANE, AIR-PERMEABLE MEDIUM USING THE SAME, AND FILTER MEMBER USING THE SAME

 #62
20230018302
2023-01-19

FILTRATION MEDIA

 #63
20230012056
2023-01-12

FILTER MEDIUM HAVING A NONWOVEN LAYER AND A MELT-BLOWN LAYER

 #64
20220362696
2022-11-17

ANTIMICROBIAL FILTER MEDIA

 #65
20220355236
2022-11-10

COALESCING FILTER MEDIA

 #66
20220347611
2022-11-03

HIGH PARTICLE CAPTURE MOISTURE ABSORBING FABRIC

 #67
20220347609
2022-11-03

FILTER MEDIUM AND COMPOSITE FILTER INCLUDING SAME

 #68
20220219105
2022-07-14

NANOFIBER FILTER MATERIAL AND RESPERATORY SYSTEM AND AIR FILTERING ARTICLE

 #69
20220203281
2022-06-30

METHOD FOR MANUFACTURING A METALLIC FUNCTIONAL PART DELIMITING A POROUS FILTERING MEDIUM, USING AN ADDITIVE MANUFACTURING METHOD, AND OBTAINED FUNCTIONAL PART

 #70
20220193588
2022-06-23

UNDULATED FILTER MEDIA

 #71
20220161171
2022-05-26

FILTER MEDIA COMPRISING FLUORINATED AND NON-FLUORINATED WATER REPELLENT ADDITIVES

 #72
20220118387
2022-04-21

Filter media, elements, and methods

 #73
20220118295
2022-04-21

BIODEGRADABLE FILTER STRUCTURES

 #74
20220105453
2022-04-07

ELECTRET-CONTAINING FILTER MEDIA

 #75
20220080340
2022-03-17

Filtration media

 #76
20220072457
2022-03-10

VACUUM CLEANER FILTER BAG HAVING IMPROVED WELD SEAM STRENGTH

 #77
20220008845
2022-01-13

WASHING MACHINE WITH FILTER GROUP

 #78
20210394097
2021-12-23

FILTER MATERIAL FOR AUTOMATIC TRANSMISSION OIL FILTER

 #79
20210370208
2021-12-02

FILTER MEDIA COMPRISING POLYAMIDE FIBERS

 #80
20210362101
2021-11-25

FILTER MATERIAL

 #81
20210362082
2021-11-25

FACE MASK WITH FILTER MEDIUM FROM MULTICOMPONENT FILAMENTS

 #82
20210362081
2021-11-25

High temperature treated media

 #83
20210354069
2021-11-18

Air filter assembly with a permeable baffle

 #84
20210354062
2021-11-18

Filtration media

 #85
20210322908
2021-10-21

FILTERS AND FACEMASKS HAVING ANTIMICROBIAL OR ANTIVIRAL PROPERTIES

 #86
20210316238
2021-10-14

NONWOVEN MATERIAL FOR FILTRATION AND METHOD OF MAKING THE SAME

 #87
20210308609
2021-10-07

FILTER MEDIA INCLUDING OUT-OF-PLANE SOLID ELEMENTS, METHODS OF FORMING THEM, AND USES THEREOF

 #88
20210308605
2021-10-07

SOLID-LIQUID SEPARATION DEVICE AND FILTRATION DEVICE

 #89
20210291094
2021-09-23

Filter media including adhesives

 #90
20210252207
2021-08-19

Virus-collecting filter for medical aspirator system

 #91
20210236972
2021-08-05

FILTER MEDIUM COMPRISING A REINFORCED NON-WOVEN FABRIC

 #92
20210236970
2021-08-05

Filter media including flame retardant fibers

 #93
20210187429
2021-06-24

Filter bags comprising a porous membrane

 #94
20210178304
2021-06-17

Electret-containing filter media

 #95
20210170317
2021-06-10

Composite filter media with multiple fiber structures including nanofibers

 #96
20210129061
2021-05-06

Fine fiber filter media and processes

 #97
20210121804
2021-04-29

WASHABLE HVAC FILTER AND FILTER MEDIA

 #98
20210106976
2021-04-15

Air-permeable sheet filter material, methods for the production and use thereof

 #99
20210069618
2021-03-11

Filter System and Filter Element with Fiberglass-Containing Filter Medium and Wound Body Fiberglass-Barrier

 #100
20210060476
2021-03-04

NANOMATERIAL INCLUDING NANOFIBERS AND BEADS FOR HEPA AIR FILTER MEDIA

 #101
20210046409
2021-02-18

Coalescence separator, in particular for use in a compressed air compressor system, compressed air compressor system, and use of a coalescence separator

 #102
20210008476
2021-01-14

INTAKE FILTER FOR VEHICLE AND MANUFACTURING METHOD THEREOF

 #103
20210001263
2021-01-07

Coalescing filter media

 #104
20210001255
2021-01-07

Electretized sheet and filter

 #105
20200398200
2020-12-24

FILTER MEDIUM HAVING A NONWOVEN LAYER AND A MELT-BLOWN LAYER

 #106
20200368654
2020-11-26

FILTER MEDIA COMPRISING ELASTOMERIC FIBERS

 #107
20200269181
2020-08-27

Filter bags comprising a porous membrane

 #108
20200269180
2020-08-27

FILTER BAGS COMPRISING A POROUS MEMBRANE

 #109
20200254372
2020-08-13

NONWOVEN AIR FILTRATION MEDIUM

 #110
20200254371
2020-08-13

Polyamide nanofiber nonwovens for filters

 #111
20200248597
2020-08-06

Coalescence separator, in particular for use in a crankcase ventilation system, crankcase ventilation system and use of coalescence separator

 #112
20200217275
2020-07-09

Filter Medium and Production Method, Filter Element, Use of the Filter Element, and Water Injection System

 #113
20200172695
2020-06-04

FLUORORESIN POROUS FILM AND PREPARATION METHOD THEREOF

 #114
20200155991
2020-05-21

Drainage medium for gas filter

 #115
20200155985
2020-05-21

Filter Medium, Method for Producing Same, and Use of the Filter Medium in a Filter Element

 #116
20200139281
2020-05-07

Filter media with irregular structure

 #117
20200122068
2020-04-23

Fine fiber media layer

 #118
20200086255
2020-03-19

Soy based filtration system

 #119
20200086236
2020-03-19

High bulk coalescing filter media and use thereof

 #120
20200063354
2020-02-27

Air filtration articles

 #121
20200063351
2020-02-27

Paper product articles

 #122
20200060316
2020-02-27

HIGH-PURITY COMPOSITE MATERIALS, METHODS OF MAKING HIGH-PURITY COMPOSITE MATERIALS, AND METHODS OF USING HIGH-PURITY COMPOSITE MATERIALS

 #123
20200054977
2020-02-20

Spun-bonded fabric material, object comprising a spun-bonded fabric material, filter medium, filter element, and use thereof

 #124
20200048597
2020-02-13

Separation substrate, cell separation filter, and method for producing platelet

 #125
20200047096
2020-02-13

Filtering Device, Capturing Device, and Uses Thereof

 #126
20200030729
2020-01-30

Method of making a thin filtration media

 #127
20200030728
2020-01-30

WOVEN GEOTEXTILE FILTRATION FABRICS INCLUDING CORE-SHEATH SPUN YARNS

 #128
20200001267
2020-01-02

Ultra-high performance and high purify biogenic silica filtration media

 #129
20190255473
2019-08-22

Filter media, elements, and methods

 #130
20190217231
2019-07-18

Filtration media

 #131
20190209955
2019-07-11

METHOD FOR PRODUCING A THREEDIMENSIONAL SPONGE BASED ON NANOFIBERS

 #132
20190209954
2019-07-11

IMPROVED ROOM AIR PURIFIERS AND FILTRATION MEDIA

 #133
20190201824
2019-07-04

Ceramic filter for beverage and manufacturing method of the same

 #134
20190194847
2019-06-27

Solution-Spun Polyamide Nanofiber Nonwovens

 #135
20190160415
2019-05-30

APPARATUS AND METHOD FOR SEPARATING OIL PARTICLES FROM AN AIR STREAM

 #136
20190126177
2019-05-02

Fine fiber filter media and processes

 #137
20190126176
2019-05-02

Filter medium, method of manufacturing the same and uses thereof

 #138
20190119152
2019-04-25

System and Method of Continuous Glass Filament Manufacture

 #139
20190105589
2019-04-11

COMPOSITE FILTER MEDIUM COMPRISING WET NONWOVEN FABRIC, AND MANUFACTURING METHOD THEREFOR

 #140
20190105587
2019-04-11

Filter insert of a fuel filter, filter insert, and fuel filter

 #141
20190054405
2019-02-21

Filter media pack, filter assembly, and method

 #142
20190030473
2019-01-31

High performance media for filtration and others applications

 #143
20180361287
2018-12-20

FILTER MEDIA INCLUDING A MULTI-PHASE PRE-FILTER

 #144
20180280847
2018-10-04

Process for making high efficiency synthetic filter media

 #145
20180280846
2018-10-04

Process for utilizing a high efficiency synthetic filter media

 #146
20180280845
2018-10-04

High efficiency synthetic filter media

 #147
20180280844
2018-10-04

Filter medium having excellent heat resistance

 #148
20180272260
2018-09-27

ULTRA-LOW PRESSURE DROP FLUID FILTERS AND RELATED METHODS

 #149
20180263263
2018-09-20

Compositions and methods for producing high purity filter aids

 #150
20180243674
2018-08-30

ELECTRET-CONTAINING FILTER MEDIA

 #151
20180236389
2018-08-23

Electret-containing filter media

 #152
20180236385
2018-08-23

ELECTRET-CONTAINING FILTER MEDIA

 #153
20180236384
2018-08-23

Electret-containing filter media

 #154
20180185777
2018-07-05

Composite media for fuel streams

 #155
20180122655
2018-05-03

ENDPOINT GAS LINE FILTER FOR SUBSTRATE PROCESSING EQUIPMENT

 #156
20180044230
2018-02-15

Preparation For Fiberglass Air Filtration Media

 #157
20180001247
2018-01-04

MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA

 #158
20180001242
2018-01-04

Biological fluid filters having flexible walls and methods for making such filters

 #159
20170365864
2017-12-21

Porous support having excellent filling characteristics of ion conductor, method for manufacturing the same, and reinforced membrane including the same

 #160
20170361254
2017-12-21

Melt spun filtration media for respiratory devices and face masks

 #161
20170341006
2017-11-30

Coalescing filter media

 #162
20170319993
2017-11-09

Fine fiber media layer

 #163
20170239601
2017-08-24

Stretchable laminated filter material and protective article

 #164
20170232372
2017-08-17

Filter media including flame retardant fibers

 #165
20170209823
2017-07-27

Filter and filter media having a fiber blend

 #166
20170197163
2017-07-13

Styrene-acrylonitrile fine fibers, filter media, recirculation filters, and methods

 #167
20170151382
2017-06-01

Biological fluid filters having flexible walls and methods for making such filters

 #168
20170137981
2017-05-18

NON-WOVEN FABRIC

 #169
20170120174
2017-05-04

Thermally bonded multi-layer felt filtration media

 #170
20170087496
2017-03-30

Filter Medium and Use of the Filter Medium

 #171
20170066658
2017-03-09

BOP WATER FILTER CARTRIDGE

 #172
20160332907
2016-11-17

Preparation for fiberglass air filtration media

 #173
20160310883
2016-10-27

Leukocyte removal filter material and leukocyte removal method

 #174
20160296856
2016-10-13

High bulk coalescing filter media and use thereof

 #175
20160263509
2016-09-15

Coalescence filter

 #176
20160158677
2016-06-09

Fine fiber filter media and processes

 #177
20160023149
2016-01-28

Method of making a thin filtration media

 #178
20160022105
2016-01-28

Vacuum cleaner filter bag

 #179
20160016101
2016-01-21

Filtration media

 #180
20150265954
2015-09-24

Biological fluid filters having flexible walls and methods for making such filters

 #181
20150251124
2015-09-10

Ceramic honeycomb structure and its production method

 #182
20150182878
2015-07-02

Coalescence filter and method for purifying a fluid

 #183
20140196420
2014-07-17

Fine fiber media layer

 #184
20140190353
2014-07-10

Filter media with improved conductivity

 #185
20140174934
2014-06-26

Filter medium

 #186
20140157742
2014-06-12

Waved filter media and elements

 #187
20140044756
2014-02-13

Multilayer nanofiber filter

 #188
20130341290
2013-12-26

FIBRILLATED FIBERS FOR LIQUID FILTRATION MEDIA

 #189
20130327218
2013-12-12

Filter media pack, filter assembly, and method

 #190
20130305671
2013-11-21

Filter medium

 #191
20130153517
2013-06-20

Multi-ply filter medium

 #192
20130001154
2013-01-03

Fine fiber media layer

 #193
20120318754
2012-12-20

Fine fiber filter media and processes

 #194
20120304602
2012-12-06

WAVED FILTER MEDIA AND ELEMENTS

 #195
20120234748
2012-09-20

High temperature treated media

 #196
20120227468
2012-09-13

TUBULAR LIQUID-TREATING FILTER, METHOD FOR CAPTURING AND REMOVING OIL CONTENT IN LIQUID, METHOD FOR PRODUCING BEVERAGE LIQUID, AND METHOD FOR MEASURING OIL GRAM LIFE OF TUBULAR FILTER

 #197
20120217194
2012-08-30

Porous Pavement for Water Quality and Quantity Management

 #198
20120204527
2012-08-16

Fine fiber media layer

 #199
20120152824
2012-06-21

FINE FIBER FILTER MEDIA AND PROCESSES

 #200
20120152821
2012-06-21

FINE FIBER FILTER MEDIA AND PROCESSES

 #201
20120148792
2012-06-14

Ceramic honeycomb structure and its production method

 #202
20120097032
2012-04-26

Flutable fiber webs with high dust holding capacity

 #203
20120067220
2012-03-22

Filtration media and applications thereof

 #204
20120048797
2012-03-01

FIBER WEB HAVING A HIGH STIFFNESS

 #205
20120017763
2012-01-26

Filtration media and applications thereof

 #206
20110265312
2011-11-03

Filter media with improved conductivity

 #207
20110259816
2011-10-27

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

 #208
20110232653
2011-09-29

ANTIMICROBIAL, DUSTPROOF FABRIC AND MASK

 #209
20110162337
2011-07-07

Waved filter media and elements

 #210
20110114095
2011-05-19

ANTIVIRAL METAL IMPREGNATED ACTIVATED CARBON CLOTH COMPONENTS

 #211
20110067369
2011-03-24

Fine fiber media layer

 #212
20110016838
2011-01-27

High performance gas turbine inlet filter (HEPA) using membrane media

 #213
20100319543
2010-12-23

Flutable fiber webs with high dust holding capacity

 #214
20100319310
2010-12-23

Fiber web having a high stiffness

 #215
20100314333
2010-12-16

FLUTABLE FIBER WEBS WITH LOW SURFACE ELECTRICAL RESISTIVITY FOR FILTRATION

 #216
20100313760
2010-12-16

Membrane-free filter and/or integral framing for filter

 #217
20100313757
2010-12-16

Air cooling system incorporating membrane-free filter and/or integral framing for filter

 #218
20100307338
2010-12-09

Filter medium

 #219
20100307119
2010-12-09

Multilayer nanofiber filter

 #220
20100212272
2010-08-26

FILTER MEDIA SUITABLE FOR ASHRAE APPLICATIONS

 #221
20100178507
2010-07-15

Polyamide Fine Fibers

 #222
20100095843
2010-04-22

Air pollution control filter elements for filtration systems

 #223
20100064645
2010-03-18

Fine fiber media layer

 #224
20090238646
2009-09-24

Method of constructing a filtering pavement surface

 #225
20080257153
2008-10-23

Patterned porous venting materials

 #226
20080202078
2008-08-28

Waved filter media and elements

 #227
20080166938
2008-07-10

MICROFIBER SPLIT FILM FILTER FELT AND METHOD OF MAKING SAME

 #228
20080110822
2008-05-15

Fine fiber media layer

 #229
20080105611
2008-05-08

Filters having improved permeability and virus removal capabilities

 #230
20080023383
2008-01-31

Clarification and sorptive-filtration system for the capture of constituents and particulate matter in liquids and gases

 #231
20070271891
2007-11-29

Polymer, polymer microfiber, polymer nanofiber and applications including filter structures

 #232
20070271883
2007-11-29

Bag house filter with fine fiber and spun bonded media

 #233
20070181001
2007-08-09

Adsorptive filtering material having biological and chemical protective function and use thereof

 #234
20070163217
2007-07-19

Cellulosic/polyamide composite

 #235
20070028767
2007-02-08

Filter media with improved conductivity

 #236
20070012007
2007-01-18

Polymer, polymer microfiber, polymer nanofiber and applications including filter structures

 #237
20060089072
2006-04-27

Composite filtration media

 #238
20060032807
2006-02-16

Clarification and sorptive-filtration system for the capture of constituents and particulate matter in liquids and gases

 #239
20050247608
2005-11-10

Filters having improved permeability and virus removal capabilities

 #240
17229757
2026-06-02

Non-passive anti-viral and nanofilter based respirators