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D21H27/08

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DTEXTILES PAPER D21Papermaking D21HPULP COMPOSITIONS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D IMPREGNATING OR COATING OF PAPER TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G PAPER NOT OTHERWISE PROVIDED FOR D21H27/00Special paper not otherwise provided for

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D21H27/08Filter paper

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Patents Grantslast 30 patents

Information Patent Grant
Method for making an adsorptive air filter
- Patent number 12,172,112
- Issue date Dec 24, 2024
- IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY
- Tarek Ahmed Yousef
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Filter paper
- Patent number 12,110,636
- Issue date Oct 8, 2024
- Delfortgroup AG
- Dieter Möhring
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Biodegradable air filter from date palm and method of fabrication t...
- Patent number 12,102,947
- Issue date Oct 1, 2024
- IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY
- Tarek Ahmed Yousef
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Soy based filtration system
- Patent number 12,090,431
- Issue date Sep 17, 2024
- Purdue Research Foundation
- Anderson Smith
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Hot-extraction paper
- Patent number 11,939,725
- Issue date Mar 26, 2024
- Mondi AG
- Elisabeth Schwaiger
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Multifilter segment, smoking article with multifilter segment, and...
- Patent number 11,871,782
- Issue date Jan 16, 2024
- Japan Tobacco Inc.
- Noriko Osawa
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Filtered smoking article
- Patent number 11,717,023
- Issue date Aug 8, 2023
- Japan Tobacco Inc.
- Toru Sakurai
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Soy based filtration system
- Patent number 11,691,099
- Issue date Jul 4, 2023
- Purdue Research Foundation
- Anderson Smith
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Aramid-based paper with improved properties
- Patent number 11,686,048
- Issue date Jun 27, 2023
- Teijin Aramid B.V.
- Antonius J. J. Hendriks
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Grant
Microfibrillated cellulose foams
- Patent number 11,680,370
- Issue date Jun 20, 2023
- Borregaard AS
- Otto Soidinsalo
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Porous substrate with porous nano-particles structure and productio...
- Patent number 11,624,155
- Issue date Apr 11, 2023
- National Taiwan University of Science and Technology
- Wei-Hung Chiang
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Preparation method of cotton bast fiber and chitosan composite non-...
- Patent number 11,383,189
- Issue date Jul 12, 2022
- Jiangnan University
- Xiuliang Hou
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Chemical detection of substances by utilizing a sample medium impre...
- Patent number 11,371,972
- Issue date Jun 28, 2022
- DETECTACHEM, INC.
- Travis Kisner
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
High-permeability cellulose fibers
- Patent number 11,359,308
- Issue date Jun 14, 2022
- GP Cellulose GmbH
- Alan Jeffrey Campbell
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Aromatized and flavored paper products
- Patent number 11,346,051
- Issue date May 31, 2022
- IIW ENTOURAGE DELIVERY SYSTEMS Ltd.
- Gil Luxenbourg
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Filter paper for cigarette filters
- Patent number 11,083,217
- Issue date Aug 10, 2021
- Delfortgroup AG
- Stefan Bachmann
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Grant
Superficially treated flexible materials suitable for filtering and...
- Patent number 11,041,270
- Issue date Jun 22, 2021
- Universita Degli Studi di Milano-Bicocca
- Claudia Riccardi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Marked filter paper for use as test substrate in standardized metho...
- Patent number 11,013,257
- Issue date May 25, 2021
- Axagarius GmbH & Co. KG
- Markus Meusel
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Cellulose materials and methods of making and using same
- Patent number 10,988,897
- Issue date Apr 27, 2021
- ECOINNO (H.K.) LIMITED
- George Chen
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Filter medium for liquid filter and liquid filter
- Patent number 10,874,964
- Issue date Dec 29, 2020
- TEIJIN FRONTIER CO.. LTD.
- Kazuyoshi Sakita
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Fibrous substrate containing fibers and nanofibrillar polysaccharide
- Patent number 10,781,025
- Issue date Sep 22, 2020
- AHLSTROM-MUNKSJÖ OYJ
- Francois Toubeau
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
High-permeability cellulose fibers
- Patent number 10,767,280
- Issue date Sep 8, 2020
- GP Cellulose GmbH
- Alan Jeffrey Campbell
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information Patent Grant
Chemical detection of substances by utilizing a sample medium impre...
- Patent number 10,705,062
- Issue date Jul 7, 2020
- DETECTACHEM, INC.
- Travis Kisner
- G01 - MEASURING TESTING
Information Patent Grant
Filter medium for filter, method for producing the same, and filter
- Patent number 10,550,803
- Issue date Feb 4, 2020
- TEIJIN FRONTIER CO., LTD.
- Yuichi Hamada
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Filter element with a luminescent marker
- Patent number 10,478,760
- Issue date Nov 19, 2019
- HYDAC FILTERTECHNIK GMBH
- Volkmar Klein
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Multilayer filter medium for filter, method for producing the same,...
- Patent number 10,252,201
- Issue date Apr 9, 2019
- TEIJIN FRONTIER CO., LTD.
- Mie Kamiyama
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Chemical detection of substances by utilizing a sample medium impre...
- Patent number 10,203,310
- Issue date Feb 12, 2019
- DETECTACHEM LLC
- Travis Kisner
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Cross-linked polyethylene fiber, its use and process for its manufa...
- Patent number 10,000,587
- Issue date Jun 19, 2018
- Baumhueter Extrusion Gmbh
- Ingo Knack
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Sample preservation method and sample application substrate
- Patent number 9,989,446
- Issue date Jun 5, 2018
- GE Healthcare UK Limited
- Philip Robert Mallender
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Soil adsorbing composites, compositions and methods for using same
- Patent number 9,895,675
- Issue date Feb 20, 2018
- The Procter & Gamble Company
- Robin Lynn McKiernan
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents

Information Patent Application
FILTER MATERIAL FOR AIR FILTER AND METHOD FOR PRODUCING FILTER MATE...
- Publication number 20240408523
- Publication date Dec 12, 2024
- HOKUETSU CORPORATION
- Nozomi TASHIRO
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Application
CIGARETTE FILTER INCLUDING LYOCELL TOW
- Publication number 20240407430
- Publication date Dec 12, 2024
- KT&G Corporation
- Jin Chul YANG
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
THERMOPLASTIC-IMPREGNATED CELLULOSIC NONWOVEN AS A COMPOSTABLE FILT...
- Publication number 20240400280
- Publication date Dec 5, 2024
- Ahlstrom Oyj
- Raphael BARDET
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Application
Composition and Method for Making a Water Filter by Accretion
- Publication number 20240367149
- Publication date Nov 7, 2024
- Koslow Technologies Corporation
- Jules A. Koslow
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Filter Comprising A Paper Substrate Modified With A Natural Polysac...
- Publication number 20240206530
- Publication date Jun 27, 2024
- SWM Holdco Luxembourg
- Raoul Herve
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Filter Comprising a Paper Substrate Modified With Natural Starch
- Publication number 20240206531
- Publication date Jun 27, 2024
- SWM Holdco Luxembourg
- Raoul Herve
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
DECREASING FIBER DENSITY IN WET PARTS FORMED FROM SLURRIES
- Publication number 20240200279
- Publication date Jun 20, 2024
- Hewlett-Packard Development Company, L.P.
- John Joseph BRIDEN
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
FILTER MATERIAL FOR FOOD PACKAGING
- Publication number 20240175214
- Publication date May 30, 2024
- Andrew K. Jordan
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
FILTER WITH ADDED LIQUID, FLAVOR INHALATION ARTICLE EQUIPPED WITH S...
- Publication number 20240074490
- Publication date Mar 7, 2024
- Japan Tobacco Inc.
- Michihiro INAGAKI
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Application
Filter Paper for Cigarette Filters and Filter Comprising It
- Publication number 20240026609
- Publication date Jan 25, 2024
- Miquel y Costas & Miquel, S.A.
- Agustín Tosas Fuentes
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
BIO-PROTECTIVE COMPOSITE MATERIALS, METHOD OF MANUFACTURING THE BIO...
- Publication number 20230357990
- Publication date Nov 9, 2023
- INDUSTRY-ACADEMIC COOPERATION FOUNDATION YONSEI UNIVERSITY
- Jae Chul PYUN
- B82 - NANO-TECHNOLOGY
Information Patent Application
SOY BASED FILTRATION SYSTEM
- Publication number 20230285883
- Publication date Sep 14, 2023
- Purdue Research Foundation
- Anderson Smith
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
FILTER MEDIUM FOR AIR FILTERS AND METHOD FOR PRODUCING SAME
- Publication number 20230278008
- Publication date Sep 7, 2023
- HOKUETSU CORPORATION
- Nozomi Tashiro
- D10 - INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEX...
Information Patent Application
WET NON-WOVEN FABRIC, PREPARATION METHOD THEREFOR AND WATER TREATME...
- Publication number 20230142418
- Publication date May 11, 2023
- SHENZHEN SENIOR TECHNOLOGY MATERIAL CO., LTD.
- Li CHEN
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Application
Air filtration material, device for decontaminating air by filtrati...
- Publication number 20230112349
- Publication date Apr 13, 2023
- CELLULOTECH INC
- Daniel SAMAIN
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
HOT EXTRACTION PAPER
- Publication number 20230022704
- Publication date Jan 26, 2023
- Mondi AG
- Elisabeth SCHWAIGER
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Method for Making Air Purifying Paper Goods
- Publication number 20220074145
- Publication date Mar 10, 2022
- Leonard Tim Sperry
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
HOT-EXTRACTION PAPER
- Publication number 20220064867
- Publication date Mar 3, 2022
- Mondi AG
- Elisabeth SCHWAIGER
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
ANTIVIRAL GLASS FIBER TREATMENT, PROCESS AND METHOD OF MANUFACTURING
- Publication number 20220062807
- Publication date Mar 3, 2022
- UOP LLC
- James M. Hodges
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
Paper Sheet and Method of Making It
- Publication number 20220022529
- Publication date Jan 27, 2022
- Jiayi Pan
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Application
CELLULOSE MATERIALS AND METHODS OF MAKING AND USING THE SAME
- Publication number 20210254285
- Publication date Aug 19, 2021
- Ecoinno (H.K.) Limited
- George Chen
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
ARAMID-BASED PAPER WITH IMPROVED PROPERTIES
- Publication number 20210140108
- Publication date May 13, 2021
- TEIJIN ARAMID B.V.
- Antonius J.J. HENDRIKS
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Improved Filter Paper
- Publication number 20210123189
- Publication date Apr 29, 2021
- delfortgroup AG
- Dieter Möhring
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
Porous Substrate with Porous Nano-Particles Structure and Productio...
- Publication number 20210062427
- Publication date Mar 4, 2021
- National Taiwan University of Science and Technology
- Wei-Hung Chiang
- B22 - CASTING POWDER METALLURGY
Information Patent Application
WET NON-WOVEN FABRIC FOR FILTER, FILTER MEDIUM FOR FILTER, AND FILTER
- Publication number 20210016213
- Publication date Jan 21, 2021
- TOYOBO CO., LTD.
- Kento Takami
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
Information Patent Application
LYOCELL FIBER WITH INCREASED TENDENCY TO FIBRILLATE
- Publication number 20210010163
- Publication date Jan 14, 2021
- LENZING AKTIENGESELLSCHAFT
- Martina Opietnik
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
SUPERFICIALLY TREATED FLEXIBLE MATERIALS SUITABLE FOR FILTERING AND...
- Publication number 20200362507
- Publication date Nov 19, 2020
- UNIVERSITA' DEGLI STUDI DI MILANO-BICOCCA
- Claudia Riccardi
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Application
HIGH-PERMEABILITY CELLULOSE FIBERS
- Publication number 20200362473
- Publication date Nov 19, 2020
- GP Cellulose GMbH
- Alan Jeffrey Campbell
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Application
FILTERED SMOKING ARTICLE
- Publication number 20200323258
- Publication date Oct 15, 2020
- Japan Tobacco Inc.
- Toru Sakurai
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES
Information Patent Application
MULTIFILTER SEGMENT, SMOKING ARTICLE WITH MULTIFILTER SEGMENT, AND...
- Publication number 20200323260
- Publication date Oct 15, 2020
- Japan Tobacco Inc.
- Noriko OSAWA
- A24 - TOBACCO CIGARS CIGARETTES SMOKERS' REQUISITES

Filter paper

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Method for making an adsorptive air filter

Filter paper

Biodegradable air filter from date palm and method of fabrication t...

Soy based filtration system

Hot-extraction paper

Multifilter segment, smoking article with multifilter segment, and...

Filtered smoking article

Soy based filtration system

Aramid-based paper with improved properties

Microfibrillated cellulose foams

Porous substrate with porous nano-particles structure and productio...

Preparation method of cotton bast fiber and chitosan composite non-...

Chemical detection of substances by utilizing a sample medium impre...

High-permeability cellulose fibers

Aromatized and flavored paper products

Filter paper for cigarette filters

Superficially treated flexible materials suitable for filtering and...

Marked filter paper for use as test substrate in standardized metho...

Cellulose materials and methods of making and using same

Filter medium for liquid filter and liquid filter

Fibrous substrate containing fibers and nanofibrillar polysaccharide

High-permeability cellulose fibers

Chemical detection of substances by utilizing a sample medium impre...

Filter medium for filter, method for producing the same, and filter

Filter element with a luminescent marker

Multilayer filter medium for filter, method for producing the same,...

Chemical detection of substances by utilizing a sample medium impre...

Cross-linked polyethylene fiber, its use and process for its manufa...

Sample preservation method and sample application substrate

Soil adsorbing composites, compositions and methods for using same

Patents Applicationslast 30 patents

FILTER MATERIAL FOR AIR FILTER AND METHOD FOR PRODUCING FILTER MATE...

CIGARETTE FILTER INCLUDING LYOCELL TOW

THERMOPLASTIC-IMPREGNATED CELLULOSIC NONWOVEN AS A COMPOSTABLE FILT...

Composition and Method for Making a Water Filter by Accretion

Filter Comprising A Paper Substrate Modified With A Natural Polysac...

Filter Comprising a Paper Substrate Modified With Natural Starch

DECREASING FIBER DENSITY IN WET PARTS FORMED FROM SLURRIES

FILTER MATERIAL FOR FOOD PACKAGING

FILTER WITH ADDED LIQUID, FLAVOR INHALATION ARTICLE EQUIPPED WITH S...

Filter Paper for Cigarette Filters and Filter Comprising It

BIO-PROTECTIVE COMPOSITE MATERIALS, METHOD OF MANUFACTURING THE BIO...

SOY BASED FILTRATION SYSTEM

FILTER MEDIUM FOR AIR FILTERS AND METHOD FOR PRODUCING SAME

WET NON-WOVEN FABRIC, PREPARATION METHOD THEREFOR AND WATER TREATME...

Air filtration material, device for decontaminating air by filtrati...

HOT EXTRACTION PAPER

Method for Making Air Purifying Paper Goods

HOT-EXTRACTION PAPER

ANTIVIRAL GLASS FIBER TREATMENT, PROCESS AND METHOD OF MANUFACTURING

Paper Sheet and Method of Making It

CELLULOSE MATERIALS AND METHODS OF MAKING AND USING THE SAME

ARAMID-BASED PAPER WITH IMPROVED PROPERTIES

Improved Filter Paper

Porous Substrate with Porous Nano-Particles Structure and Productio...

WET NON-WOVEN FABRIC FOR FILTER, FILTER MEDIUM FOR FILTER, AND FILTER

LYOCELL FIBER WITH INCREASED TENDENCY TO FIBRILLATE

SUPERFICIALLY TREATED FLEXIBLE MATERIALS SUITABLE FOR FILTERING AND...

HIGH-PERMEABILITY CELLULOSE FIBERS

FILTERED SMOKING ARTICLE

MULTIFILTER SEGMENT, SMOKING ARTICLE WITH MULTIFILTER SEGMENT, AND...