ClassID:

126383

D21C9/002 - CPC Classification

Classification description:

After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere; Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives

Sub-classes:
Recent Application in this class:
#1
20260109646
2026-04-23

COLLAPSIBLE ENGAGEMENT MECHANISM

#2
20250389085
2025-12-25

METHOD FOR PREPARING CARBAMATED CELLULOSE FIBERS AND METHOD FOR PREPARING CARBAMATED CELLULOSE FINE FIBERS

#3
20250369189
2025-12-04

METHOD FOR PRODUCING CELLULOSE-FIBER-CONTAINING MATERIAL, METHOD FOR PRODUCING REACTION CELLULOSE FIBERS, AND METHOD FOR PRODUCING REACTION MICROFIBERS

#4
20250340673
2025-11-06

PROCESSES AND APPARATUS FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

#5
20240247081
2024-07-25

PROCESSES AND APPARATUS FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

#6
20230257937
2023-08-17

Method for dewatering a web comprising microfibrillated celluose and a film produced from the dewatered web

#7
20230250581
2023-08-10

Treated pulp and methods of making and using same

#8
20230132641
2023-05-04

Separation of polycotton blends

#9
20230016500
2023-01-19

COLLAPSIBLE ENGAGEMENT MECHANISM

#10
20220340688
2022-10-27

SULFONATED FINE CELLULOSE FIBER AND METHOD FOR PRODUCING SAME

#11
20220298725
2022-09-22

CELLULOSE MATERIAL PLASTICIZATION AND VISCOSITY CONTROLLED CELLULOSIC MATERIAL

#12
20220251781
2022-08-11

PROCESS TO OPTIMIZE BROWN STOCK WASHING UNIT OPERATIONS

#13
20210284757
2021-09-16

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

#14
20210262165
2021-08-26

LIGNO CELLULOSIC MATERIALS AND THE PRODUCTS MADE THEREFROM

#15
20210131038
2021-05-06

MODIFIED FIBER, METHODS, AND SYSTEMS

#16
20210087299
2021-03-25

Process for producing microcrystalline cellulose

#17
20210002825
2021-01-07

CELLULOSE PULP AND SHAPED LYOCELL ARTICLE HAVING A REDUCED CELLULOSE CONTENT

#18
20200362473
2020-11-19

High-permeability cellulose fibers

#19
20200347550
2020-11-05

Modified cellulose from chemical kraft fiber and methods of making and using the same

#20
20200308766
2020-10-01

Treated pulp and methods of making and using same

#21
20200109512
2020-04-09

PROCESS FOR PRODUCING DIFFERENTIATED CELLULOSE FIBERS COMPRISING AN ENZYMATIC TREATMENT IN ASSOCIATION WITH AN ACID STEP

#22
20200022538
2020-01-23

Absorbent towel paper web products comprising nano-filaments

#23
20200022537
2020-01-23

Soft sanitary tissue paper web products comprising nano-filaments

#24
20190292727
2019-09-26

Method for manufacturing intermediate product for conversion into microfibrillated cellulose

#25
20190257029
2019-08-22

Man-made cellulosic fiber and nonwoven product or fabric comprising the cellulosic fiber

#26
20190100604
2019-04-04

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

#27
20190085508
2019-03-21

Modified fiber from shredded pulp sheets, methods, and systems

#28
20190062562
2019-02-28

ANTI-CRACKING AGENT FOR WATER-BORNE ACRYLIC PAINT AND COATING COMPOSITIONS

#29
20190024308
2019-01-24

Modified cellulose from chemical kraft fiber and methods of making and using the same

#30
20180258589
2018-09-13

Modified fiber, methods, and systems

#31
20180135244
2018-05-17

Specialty pulp with high intrinsic viscosity

#32
20180119346
2018-05-03

Method of making bleached microcrystalline cellulose

#33
20180119345
2018-05-03

Process for producing a pulp

#34
20180078099
2018-03-22

Process for making tissue or towel products comprising nanofilaments

#35
20180073194
2018-03-15

Method for producing cellulose filaments with less refining energy

#36
20170356134
2017-12-14

Binder compositions for making crosslinked cellulose fiber

#37
20170342662
2017-11-30

Process for applying composition containing a cationic trivalent metal and debonder and fluff pulp sheet made from same

#38
20170314204
2017-11-02

Method for producing paper

#39
20170268170
2017-09-21

METHOD OF AND AN ARRANGEMENT FOR TRANSFERRING A PROCESS LIQUID, AN INDUSTRIAL FACILITY AND A METHOD OF SIMPLIFYING THE LAYOUT OF SUCH

#40
20170198436
2017-07-13

LIGNO CELLULOSIC MATERIALS AND THE PRODUCTS MADE THEREFROM

#41
20170183820
2017-06-29

Methods for producing ultrafine fiber and ultrafine fiber-containing sheet, sheet obtained thereby, and resin composite comprising laminated resins

#42
20170183817
2017-06-29

Modified fiber from shredded pulp sheets, methods, and systems

#43
20170172152
2017-06-22

Ligno cellulosic materials and the products made therefrom

#44
20170145633
2017-05-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#45
20170145632
2017-05-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#46
20170137996
2017-05-18

Modified cellulose from chemical kraft fiber and methods of making and using the same

#47
20160376749
2016-12-29

METHOD FOR PRODUCING NANOFIBRILLATED CELLULOSE

#48
20160369454
2016-12-22

Modified fiber, methods, and systems

#49
20160319484
2016-11-03

Method of and an arrangement for transferring a process liquid, an industrial facility and a method of simplifying the layout of such

#50
20160289895
2016-10-06

Methods for producing a cellulosic fiber having a high curl index and acquisition and distribution layer containing same

#51
20160289894
2016-10-06

Method for making modified cellulose products

#52
20160273162
2016-09-22

Pineapple leaf fiber fine treatment method

#53
20160237624
2016-08-18

Dry fluff pulp sheet additive

#54
20160168796
2016-06-16

Process for making hydrogels from hemicaustic byproduct

#55
20160130751
2016-05-12

Method for treating chemical pulps by treatment with ozone in the presence of magnesium ions

#56
20160076199
2016-03-17

Process for treating lignin

#57
20160032494
2016-02-04

High-permeability cellulose fibers

#58
20160030907
2016-02-04

Stabilization of suspended solid particles and/or gas bubbles in aqueous fluids

#59
20150292151
2015-10-15

Method for producing ultrahigh-viscosity refined cotton and device for transporting refined cotton pulp

#60
20150252531
2015-09-10

Process for making partly-hydrolyzed cellulose using compressed cellulosic materials

#61
20150231599
2015-08-20

Fibers of variable wettability and materials containing the fibers

#62
20150225901
2015-08-13

Method of producing dissolving pulp, dissolving pulp and use of method

#63
20150218757
2015-08-06

Method and intermediate for the production of highly refined or microfibrillated cellulose

#64
20150204017
2015-07-23

Nanocellulose production using lignosulfonic acid

#65
20150203737
2015-07-23

Plant derived cellulose compositions for use as drilling muds

#66
20150167243
2015-06-18

Energy efficient process for preparing nanocellulose fibers

#67
20150122430
2015-05-07

Method for producing fine fibers and sheet containing fine fibers

#68
20150027651
2015-01-29

Manufacture of cellulosic pulp sheets

#69
20140284008
2014-09-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#70
20140154757
2014-06-05

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

#71
20140154756
2014-06-05

Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom

#72
20140110345
2014-04-24

Lignin dewatering process

#73
20140110070
2014-04-24

Method for catalytic oxidation of cellulose and method for making a cellulose product

#74
20140053828
2014-02-27

Method for producing cellulose nanofibers

#75
20140014283
2014-01-16

Single-step method for production of nano pulp by acceleration and disintegration of raw material

#76
20130324711
2013-12-05

Process for obtaining carboxymethyl cellulose from agro-industrial residues and carboxymethyl cellulose and use thereof

#77
20130248131
2013-09-26

Modified cellulose from chemical kraft fiber and methods of making and using the same

#78
20130203981
2013-08-08

Method to product microcellulose

#79
20130203699
2013-08-08

Method for inhibiting the growth of microbes with a modified cellulose fiber

#80
20130197461
2013-08-01

Modified cellulose from chemical kraft fiber and methods of making and using the same

#81
20130066291
2013-03-14

Ligno cellulosic materials and the products made therefrom

#82
20130035263
2013-02-07

Agent and composition for oilfield applications

#83
20130025807
2013-01-31

Process for production of oxidised cellulose pulp

#84
20120322997
2012-12-20

Process for producing differentiated cellulose fibers comprising an enzymatic treatment in association with an acid step

#85
20120309060
2012-12-06

Processing biomass

#86
20120276596
2012-11-01

MODIFIED BIOMATERIAL, USES THEREOF AND MODIFICATION METHODS

#87
20120237984
2012-09-20

Processing biomass

#88
20120183772
2012-07-19

Modified cellulose from chemical kraft fiber and methods of making and using the same

#89
20120175073
2012-07-12

Modified cellulose from chemical kraft fiber and methods of making and using the same

#90
20120142909
2012-06-07

Viscosity control in compositions comprising plant fiber materials

#91
20120142068
2012-06-07

Processing biomass

#92
20120142065
2012-06-07

Processing biomass

#93
20120003704
2012-01-05

Processing biomass

#94
20110287275
2011-11-24

Ligno cellulosic materials and the products made therefrom

#95
20110174455
2011-07-21

Compositions and processes for paper production

#96
20110168345
2011-07-14

Method of producing paper and cardboard

#97
20110108227
2011-05-12

Process For Applying Composition Containing A Cationic Trivalent Metal And Debonder And Fluff Pulp Sheet Made From Same

#98
20110077354
2011-03-31

Cellulose fibers crosslinked with low molecular weight phosphorous containing polyacrylic acid and method

#99
20110039317
2011-02-17

Processing biomass

#100
20110036522
2011-02-17

Method for providing a nanocellulose involving modifying cellulose fibers

#101
20110034891
2011-02-10

Dry fluff pulp sheet additive

#102
20110027837
2011-02-03

Processing biomass

#103
20100331457
2010-12-30

Surface-mineralized organic fibers

#104
20100311846
2010-12-09

METHODS FOR CONTROLLING WATER AMOUNT IN A POLYMER COMPOSITION OR SUBSTRATE

#105
20100243187
2010-09-30

Method for applying chemical additives to pulp during the pulp processing and products made by said method

#106
20100233481
2010-09-16

Cellulose nanofiber, production method of same and cellulose nanofiber dispersion

#107
20100112351
2010-05-06

METHOD FOR PREPARING MICROFIBRILLAR POLYSACCHARIDE

#108
20100112242
2010-05-06

Processing biomass

#109
20100065236
2010-03-18

METHOD OF PRODUCING AND THE USE OF MICROFIBRILLATED PAPER

#110
20090312536
2009-12-17

Process for producing a pulp

#111
20090260152
2009-10-22

PAPER PULP COMPOSITION AND ARTICLE FORMED THEREFROM

#112
20090205794
2009-08-20

METHOD FOR THE PRODUCTION OF TISSUE PAPER

#113
20090199349
2009-08-13

Treated cellulosic fibers and absorbent articles made from them

#114
20090176094
2009-07-09

Fibre Modified By Application Of An Organosiliconate Agent, A Fibre Modifying Agent Comprising An Organosilikonate and A Method of Modifying A Fibre With Said Agent

#115
20090054863
2009-02-26

Chemical activation and refining of southern pine kraft fibers

#116
20090038212
2009-02-12

Lignin dewatering process

#117
20080295986
2008-12-04

Method of Producing Paper and Cardboard

#118
20080200358
2008-08-21

Oiling Agent for Fiber Treatment

#119
20080171370
2008-07-17

DETOXIFYING PRE-TREATED LIGNOCELLULOSE-CONTAINING MATERIALS

#120
20080167269
2008-07-10

HYDROLYSIS RESISTANT ORGANOMODIFIED SILYLATED IONIC SURFACTANTS

#121
20080082064
2008-04-03

Crosslinked carboxyalkyl cellulose fibers having permanent and non-permanent crosslinks

#122
20080075900
2008-03-27

Biocomposite material

#123
20080023164
2008-01-31

Process for Producing a Paper or Board and a Paper or Board Produced According to the Process

#124
20080017337
2008-01-24

Compositions and processes for paper production

#125
20080010853
2008-01-17

Process for Producing Dried Singulated Fibers Using Steam and Heated Air

#126
20070151679
2007-07-05

Method of producing fibre products

#127
20070131362
2007-06-14

Process for producing a fibrous product

#128
20070119556
2007-05-31

Chemical activation and refining of southern pine kraft fibers

#129
20060292951
2006-12-28

Fibers of variable wettability and materials containing the fibers

#130
20060289140
2006-12-28

Method for treating secondary fiber to achieve wet strength while retaining repulpability

#131
20060289132
2006-12-28

Method of preparing microfibrillar polysaccharide

#132
20060266487
2006-11-30

Method for the production of tissue paper

#133
20060260773
2006-11-23

Lignocellulosic materials and the products made therefrom

#134
20060185808
2006-08-24

Fixation of optical brightening agents onto papermaking fiber

#135
20060184147
2006-08-17

Treatment composition for making acquisition fluff pulp in sheet form

#136
20060037149
2006-02-23

Enzymatic degradation of cotton fibers: effect of protein cross-linking and the use of degradation to characterize fibers of plant of different genetic background

#137
20060005934
2006-01-12

Methods for forming a fluted composite

#138
20050263258
2005-12-01

Chemically cross-linked cellulosic fiber and method of making same

#139
20050256470
2005-11-17

Chemically cross-linked cellulosic fiber and method of making same

#140
20050217810
2005-10-06

Bleached polyacrylic acid crosslinked cellulosic fibers

#141
20050217809
2005-10-06

Bleached crosslinked cellulosic fibers having high color and related methods

#142
20050161177
2005-07-28

Method for the modification of cellulose fibres

#143
20050143275
2005-06-30

Endoglucanase enzyme NCE5 and cellulase preparations containing the same

#144
20050121160
2005-06-09

Process for the separation of organic nitrosonium and/or hydroxylamine compounds by means of cation exchange resins and recovery and oxidation processes based thereon

#145
20050086828
2005-04-28

Process for producing dried, singulated fibers using steam and heated air

#146
20050085150
2005-04-21

Superabsorbent cellulosic fiber and method of making same

#147
20050072542
2005-04-07

Cross-linked cellulose fibers and method of making same

#148
20050061455
2005-03-24

Chemical activation and refining of southern pine kraft fibers

#149
20050045290
2005-03-03

Method for making chemically cross-linked cellulosic fiber in the sheet form

#150
20050028953
2005-02-10

Methods for making carboxylated pulp fibers

#151
20050028952
2005-02-10

Apparatus for making carboxylated pulp fibers

#152
20050028292
2005-02-10

Methods for making carboxylated cellulosic fibers

#153
20050022952
2005-02-03

Method for producing cellulose derivatives

#154
20050022415
2005-02-03

System for making dried singulated crosslinked cellulose pulp fibers

#155
18939596
2025-04-15

Cellulose based biodegradable absorptive filter and method of making

#156
18808127
2024-12-24

Method for making an adsorptive air filter

#157
18665929
2024-10-01

Biodegradable air filter from date palm and method of fabrication thereof