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Pulping cellulose-containing materials
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D21C3/00
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Parent Industries
D
TEXTILES PAPER
D21
Papermaking
D21C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS APPARATUS THEREFOR
Current Industry
D21C3/00
Pulping cellulose-containing materials
Sub Industries
D21C3/003
with organic compounds
D21C3/006
with compounds not otherwise provided for
D21C3/02
with inorganic bases or alkaline reacting compounds
D21C3/022
in presence of S-containing compounds
D21C3/024
with NH3 or H2O
D21C3/026
in presence of O2
D21C3/028
in presence of O3
D21C3/04
with acids, acid salts or acid anhydrides
D21C3/045
in presence of O2 or O3
D21C3/06
sulfur dioxide sulfurous acid bisulfites sulfites
D21C3/08
calcium bisulfite
D21C3/10
magnesium bisulfite
D21C3/12
sodium bisulfite
D21C3/14
ammonium bisulfite
D21C3/16
nitrogen oxides nitric acid nitrates, nitrites
D21C3/18
with halogens or halogen-generating compounds
D21C3/20
with organic solvents or in solvent environment
D21C3/22
Other features of pulping processes
D21C3/222
Use of compounds accelerating the pulping processes
D21C3/224
Use of means other than pressure and temperature
D21C3/226
Use of compounds avoiding scale formation
D21C3/228
Automation of the pulping processes
D21C3/24
Continuous processes
D21C3/26
Multistage processes
D21C3/263
at least one stage being in presence of oxygen
D21C3/266
the same pulping agent being used in all stages
D21C3/28
Prevention of foam
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Patents Grants
last 30 patents
Information
Patent Grant
Catalyst free organosolv process, system and method for fractionati...
Patent number
12,359,372
Issue date
Jul 15, 2025
American Science and Technology
Ali Manesh
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Process for increasing digestion efficiency of lignocellulosic mate...
Patent number
12,351,981
Issue date
Jul 8, 2025
Solenis Technologies, L.P.
Scott Thomas Schnelle
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method for recycling waste aramid-mica composite paper
Patent number
12,351,982
Issue date
Jul 8, 2025
SHAANXI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Zhaoqing Lu
B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL
Information
Patent Grant
Adjusting a high pressure feeder based on fluid leakage
Patent number
12,344,994
Issue date
Jul 1, 2025
ANDRITZ INC.
Keith Vogel
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
System and method for refining agricultural fibers to a pulp specif...
Patent number
12,338,578
Issue date
Jun 24, 2025
Kanbol, Inc.
Miles Leach
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Container for containing cellulose resin composition and package co...
Patent number
12,330,848
Issue date
Jun 17, 2025
Asahi Kasei Kabushiki Kaisha
Koichi Ueno
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Black liquor viscosity reducing and anti-scale agent
Patent number
12,331,461
Issue date
Jun 17, 2025
Ecolab USA Inc.
Luiz Wanderley Bratfisch Pace
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method for manufacturing bleached pulp from a feedstock comprising...
Patent number
12,331,462
Issue date
Jun 17, 2025
WestRock MWV, LLC
Peter W. Hart
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method for producing densified cellulosic composite material
Patent number
12,320,065
Issue date
Jun 3, 2025
Thomas Schnider
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Polymer coated paper recycling process and composition
Patent number
12,320,067
Issue date
Jun 3, 2025
NANOCYCLE TECH INC.
Meysam Araghi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Methods and systems for processing mixed textile feedstock, isolati...
Patent number
12,319,790
Issue date
Jun 3, 2025
EVRNU, SPC
Stacy Flynn
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Modified sulfuric acid and uses thereof
Patent number
12,320,066
Issue date
Jun 3, 2025
SixRing Inc.
Clay Purdy
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Method for producing cellulose pulp, cellulose pulp and use thereof...
Patent number
12,305,332
Issue date
May 20, 2025
Suzano S.A.
Otávio Mambrim Filho
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Fluff pulp
Patent number
12,297,600
Issue date
May 13, 2025
Stora Enso Oyj
Helena Tufvesson
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Strong and tough structural wood materials, and methods for fabrica...
Patent number
12,285,882
Issue date
Apr 29, 2025
University of Maryland, College Park
Liangbing Hu
B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
Information
Patent Grant
Method for preparing fluff pulp from bamboos and fluff pulp prepare...
Patent number
12,286,750
Issue date
Apr 29, 2025
South China University of Technology
Yichao Lei
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Modified alkanesulfonic acid and uses thereof
Patent number
12,276,067
Issue date
Apr 15, 2025
SixRing Inc.
Clay Purdy
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Cellulose based biodegradable absorptive filter and method of making
Patent number
12,274,964
Issue date
Apr 15, 2025
IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY
Tarek Ahmed Yousef
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Modified sulfuric acid and uses thereof
Patent number
12,270,151
Issue date
Apr 8, 2025
SixRing Inc.
Clay Purdy
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Dissolution of cellulose in ionic liquids
Patent number
12,270,152
Issue date
Apr 8, 2025
Texas Tech University System
Noureddine Abidi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Aramid pulp and method for manufacturing the same
Patent number
12,258,714
Issue date
Mar 25, 2025
Kolon Industries, Inc.
Changhee Ko
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Approach to biomass delignification
Patent number
12,252,844
Issue date
Mar 18, 2025
SixRing Inc.
Clay Purdy
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Apparatuses, methods and systems for yield increase in a kraft cook...
Patent number
12,234,602
Issue date
Feb 25, 2025
Bracell Bahia Specialty Cellulose SA
Vinicius de Oliveira Salaroli
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Modified sulfuric acid and uses thereof
Patent number
12,234,604
Issue date
Feb 25, 2025
SixRing Inc.
Clay Purdy
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
High brightness non-wood pulp
Patent number
12,227,900
Issue date
Feb 18, 2025
Kimberly-Clark Worldwide, Inc.
Thomas G. Shannon
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
High temperature hydrator
Patent number
12,221,382
Issue date
Feb 11, 2025
Carbon Engineering ULC
Kenton Robert Heidel
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method for separating biomass components by ternary system
Patent number
12,221,747
Issue date
Feb 11, 2025
QILU UNIVERSITY OF TECHNOLOGY
Yongchao Zhang
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Hydrothermal-mechanical conversion of lignocellulosic biomass to et...
Patent number
12,195,782
Issue date
Jan 14, 2025
GranBio Intellectual Property Holdings, LLC
Theodora Retsina
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Multi-step low temperature and low pressure process for agricultura...
Patent number
12,195,919
Issue date
Jan 14, 2025
KANBOL, INC.
Miles Leach
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Sulfite-based processes for producing nanocellulose, and compositio...
Patent number
12,188,181
Issue date
Jan 7, 2025
GranBio Intellectual Property Holdings, LLC
Kimberly Nelson
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Patents Applications
last 30 patents
Information
Patent Application
EFFICIENT METHODS AND COMPOSITIONS FOR RECOVERY OF PRODUCTS FROM OR...
Publication number
20250215642
Publication date
Jul 3, 2025
Pierson Capital Environmental (Beijing) Limited
Feng LING
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
BIOMASS DELIGNIFICATION
Publication number
20250207325
Publication date
Jun 26, 2025
SixRing Inc.
Alejandra ENRIQUEZ
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
IMPROVEMENTS IN BIOMASS DELIGNIFICATION
Publication number
20250207326
Publication date
Jun 26, 2025
SixRing Inc.
Alejandra ENRIQUEZ
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
DESILICATION AND MANUFACTURE OF LOW CARBON INTENSITY CHEMI-MECHANIC...
Publication number
20250207328
Publication date
Jun 26, 2025
RED LEAF SUSTAINABLE IP CORP.
Douglas MCKENZIE
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
STRONG AND TOUGH STRUCTURAL WOOD MATERIALS, AND METHODS FOR FABRICA...
Publication number
20250162189
Publication date
May 22, 2025
University of Maryland, College Park
Liangbing HU
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
APPARATUSES, METHODS AND SYSTEMS FOR YIELD INCREASE IN A KRAFT COOK...
Publication number
20250163643
Publication date
May 22, 2025
Bracell Bahia Specialty Cellulose SA
Vinicius de Oliveira Salaroli
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
EFFICIENT METHODS AND COMPOSITIONS FOR RECOVERY OF PRODUCTS FROM OR...
Publication number
20250146217
Publication date
May 8, 2025
Pierson Capital Environmental (Beijing) Limited
Feng LING
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
HIGH BRIGHTNESS NON-WOOD PULP
Publication number
20250146219
Publication date
May 8, 2025
Kimberly-Clark Worldwide, Inc.
Thomas G. Shannon
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
PURIFIED MEDICINAL CANNABIS NON-HEMP HURD FIBER, AND ARTICLES CONTA...
Publication number
20250137199
Publication date
May 1, 2025
David Pauwels
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
ANTI-MYOPIA PAPER SHEET
Publication number
20250137201
Publication date
May 1, 2025
GANSU YUDA PRINTING MATERIALS CO., LTD.
PING CAO
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
LOW TEMPERATURE AND LOW PRESSURE PROCESS FOR AGRICULTURAL FEEDSTOCK...
Publication number
20250101683
Publication date
Mar 27, 2025
Kanbol, Inc.
Miles Leach
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
PROCESSES FOR FRACTIONATION OF BIOMASS
Publication number
20250075425
Publication date
Mar 6, 2025
The Board of Trustees of the University of Alabama
James Dennis Pierog-Sheehan
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
CATALYST FREE ORGANOSOLV PROCESS, SYSTEM, AND METHOD FOR FRACTIONAT...
Publication number
20250075427
Publication date
Mar 6, 2025
AMERICAN SCIENCE AND TECHNOLOGY
Ali Manesh
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
NANOCELLULOSE PRODUCTION CO-LOCATED AT A PULP AND PAPER MILL
Publication number
20250059707
Publication date
Feb 20, 2025
GRANBIO INTELLECTUAL PROPERTY HOLDINGS, LLC
Kimberly NELSON
B82 - NANO-TECHNOLOGY
Information
Patent Application
NANOCELLULOSE-REINFORCED CORRUGATED MEDIUM
Publication number
20250059709
Publication date
Feb 20, 2025
GRANBIO INTELLECTUAL PROPERTY HOLDINGS, LLC
Theodora RETSINA
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
HYDROPHOBIC NANOCELLULOSE-COATED PAPER AND PAPERBOARD
Publication number
20250059357
Publication date
Feb 20, 2025
GRANBIO INTELLECTUAL PROPERTY HOLDINGS, LLC
Kimberly NELSON
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
OPTIMIZATION OF CHEMICAL CONSUMPTION IN BIOMASS DELIGNIFICATION
Publication number
20250052002
Publication date
Feb 13, 2025
SixRing Inc.
Tenzin LEKSMON
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
USE OF A MODIFIED ACID IN DUAL PURPOSE BIOMASS DELIGNIFICATION
Publication number
20250043507
Publication date
Feb 6, 2025
SixRing Inc.
Matthew DEWIT
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS
Publication number
20250012010
Publication date
Jan 9, 2025
Kimberly-Clark Worldwide, Inc.
Zhiying Yu
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
A method, use of the same, a pulp composition, and a system
Publication number
20240426050
Publication date
Dec 26, 2024
METSÄ BOARD OYJ
Mikko Nikamaa
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
A METHOD FOR CHEMICAL PULP PRODUCTION IN A MULTI-STAGE PROCESS
Publication number
20240410109
Publication date
Dec 12, 2024
Andritz AB
Ola LARSSON
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
PROCESS FOR TREATMENT OF BIOMASS FOR PULPING AND BIOREFINERY APPLIC...
Publication number
20240401270
Publication date
Dec 5, 2024
FUMA LABS PRIVATE LIMITED
Shubham SINGH
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
APPROACH TO BIOMASS DELIGNIFICATION
Publication number
20240368834
Publication date
Nov 7, 2024
SixRing Inc.
Clay Purdy
C01 - INORGANIC CHEMISTRY
Information
Patent Application
METHODS OF INCREASING FORMABILITY OF A PALM SHEATH MATERIAL, METHOD...
Publication number
20240344270
Publication date
Oct 17, 2024
Purdue Research Foundation
Srinivasan Chandrasekar
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF
Publication number
20240337069
Publication date
Oct 10, 2024
Wm. Wrigley Jr. Company
Preeti TYAGI
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
METHOD FOR PREPARING FLUFF PULP FROM BAMBOOS AND FLUFF PULP PREPARE...
Publication number
20240328083
Publication date
Oct 3, 2024
SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Yichao LEI
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
DELIGNIFICATION OF MATERIALS IN DEEP EUTECTIC SOLVENTS
Publication number
20240328084
Publication date
Oct 3, 2024
TEXAS TECH UNIVERSITY SYSTEM
Julia L. Shamshina
D02 - YARNS MECHANICAL FINISHING OF YARNS OR ROPES WARPING OR BEAMING
Information
Patent Application
MODIFIED SULFURIC ACID AND USES THEREOF
Publication number
20240318381
Publication date
Sep 26, 2024
SixRing Inc.
Clay PURDY
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
MODIFIED SULFURIC ACID AND USES THEREOF
Publication number
20240309585
Publication date
Sep 19, 2024
SixRing Inc.
Clay PURDY
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Application
A METHOD FOR PRODUCING A CHEMI-THERMOMECHANICAL FIBROUS PULP FROM N...
Publication number
20240309586
Publication date
Sep 19, 2024
RELEAF PAPER FRANCE SAS
Valentyn FRECHKA
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE