ClassID:

126422

D21C9/163 - 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; Bleaching ; Apparatus therefor with per compounds with peroxides

Recent Application in this class:
#1
20260139435
2026-05-21

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#2
20260117462
2026-04-30

METHOD AND SYSTEM FOR RECYCLING TEXTILE MATERIAL

#3
20260109646
2026-04-23

COLLAPSIBLE ENGAGEMENT MECHANISM

#4
20250389085
2025-12-25

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

#5
20250388501
2025-12-25

COMPOSITION AND USE THEREOF

#6
20250314012
2025-10-09

USE OF CELLULASE TO IMPROVE VISCOSITY CONTROL OF KRAFT DISSOLVING PULP

#7
20250283276
2025-09-11

SYSTEM FOR DECOLORIZATION OF MATERIAL COMPRISING CELLULOSE

#8
20250146219
2025-05-08

HIGH BRIGHTNESS NON-WOOD PULP

#9
20250146218
2025-05-08

RECYCLING OF MIXTURES OF TEXTILES COMPRISING CELLULOSE

#10
20250122668
2025-04-17

METHOD FOR DISTRUBTING CHEMICALS IN DELIGNIFICTION STAGES OF PULP BLEACHING PROCESS

#11
20250116064
2025-04-10

Bleaching Trichomes to Remove Proteins

#12
20250034807
2025-01-30

REDUCED FURFURAL CONTENT IN POLYACRYLIC ACID CROSSLINKED CELLULOSE FIBERS

#13
20250012010
2025-01-09

NON-WOOD PULP HAVING HIGH BRIGHTNESS AND LOW DEBRIS

#14
20240337069
2024-10-10

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#15
20240336526
2024-10-10

Crystalline Cellulose Reinforced Cement

#16
20240328083
2024-10-03

Method for preparing fluff pulp from bamboos and fluff pulp prepared thereby

#17
20240263394
2024-08-08

Modified sulfuric acid and uses thereof

#18
20240247438
2024-07-25

APPROACH TO BIOMASS DELIGNIFICATION

#19
20240084507
2024-03-14

Juncao pulp for spinning and preparation method and use thereof

#20
20240052567
2024-02-15

Bleaching trichomes to remove proteins

#21
20240018723
2024-01-18

Non-wood pulp having high brightness and low debris

#22
20230407562
2023-12-21

High brightness non-wood pulp

#23
20230392320
2023-12-07

METHOD FOR BLEACHING PULP FROM RECYCLED TEXTILE MATERIAL

#24
20230383461
2023-11-30

REDUCED FURFURAL CONTENT IN POLYACRYLIC ACID CROSSLINKED CELLULOSE FIBERS

#25
20230357988
2023-11-09

PROCESS FOR TREATING TERRESTRIAL-BASED AND MARINE-BASED BIOMASSES

#26
20230349098
2023-11-02

SHORT-SEQUENCE ECF BLEACHING PROCESS X/Z/D-EOP-D OR X/D/Z-EOP-D FOR KRAFT WOOD PULP

#27
20230332358
2023-10-19

Oxidized cellulose materials

#28
20230323597
2023-10-12

Method for separating biomass components by ternary system

#29
20230265609
2023-08-24

HIGH YIELD CHEMICAL PULPING AND BLEACHING PROCESS

#30
20230203751
2023-06-29

PROCESS AND APPARATUS FOR PRODUCING BLEACHED CELLULOSE

#31
20230167604
2023-06-01

High efficiency fiber bleaching process

#32
20230031382
2023-02-02

Process for manufacturing a fibre web

#33
20230016500
2023-01-19

COLLAPSIBLE ENGAGEMENT MECHANISM

#34
20230009849
2023-01-12

ODOR CONTROL PULP COMPOSITION

#35
20220349123
2022-11-03

Bleaching trichomes to remove proteins

#36
20220267957
2022-08-25

METHOD FOR MANUFACTURING BLEACHED PULP, FEEDSTOCK, AND PACKAGING SYSTEM

#37
20220267955
2022-08-25

Modified sulfuric acid and uses thereof

#38
20220213648
2022-07-07

Oxygen treatment of high kappa fibers

#39
20220195664
2022-06-23

Approach to biomass delignification

#40
20220186434
2022-06-16

Combination approach to delignification of biomass under ambient conditions

#41
20220170206
2022-06-02

Approach to biomass delignification

#42
20220081833
2022-03-17

PREPARATION OF CELLULOSE FIBERS

#43
20210395465
2021-12-23

ABSORPTION AND FILTRATION MEDIA

#44
20210381163
2021-12-09

Method for separating lignin from ligno-cellulosic material

#45
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#46
20210355634
2021-11-18

A COMPOSITION FOR USE AS PEROXIDE STABILIZER

#47
20210307332
2021-10-07

POLYMER-STABILIZED AQUEOUS HYDROGEN PEROXIDE SOLUTIONS AND ASSOCIATED METHODS

#48
20210269973
2021-09-02

Method for recovery of cellulosic material from waste ligno-cellulosic material

#49
20210262165
2021-08-26

LIGNO CELLULOSIC MATERIALS AND THE PRODUCTS MADE THEREFROM

#50
20210108375
2021-04-15

OXIDIZED CELLULOSE CONTAINING PACKAGING MATERIALS

#51
20210079594
2021-03-18

High efficiency fiber bleaching process

#52
20210062420
2021-03-04

Method for preparing dissolving pulp by TCF bleaching of poplar KP

#53
20210062419
2021-03-04

Method For Preparing Dissolving Pulp By Totally Chlorine-Free Bleaching Of Poplar Kraft Pulp

#54
20210032812
2021-02-04

BLEACHING AND SHIVE REDUCTION PROCESS FOR NON-WOOD FIBERS

#55
20210032801
2021-02-04

BLEACHING AND SHIVE REDUCTION FOR NON-WOOD FIBERS

#56
20200385928
2020-12-10

Odor control pulp composition

#57
20200347550
2020-11-05

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

#58
20200332466
2020-10-22

BLEACHING AND SHIVE REDUCTION PROCESS FOR NON-WOOD FIBERS

#59
20200181840
2020-06-11

Reduced furfural content in polyacrylic acid crosslinked cellulose fibers

#60
20200181839
2020-06-11

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#61
20200095728
2020-03-26

Method for isolating alpha cellulose from lignocellulosic materials

#62
20200079692
2020-03-12

Crystalline cellulose reinforced cement

#63
20200077790
2020-03-12

Collapsible engagement mechanism

#64
20200002887
2020-01-02

Bleaching trichomes to remove proteins

#65
20190345672
2019-11-14

Method for bleaching paper pulp

#66
20190271112
2019-09-05

Method for lignin depolymerisation

#67
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#68
20190257031
2019-08-22

Use of Cellulase to improve Viscosity Control of Dissolving Pulp

#69
20190249363
2019-08-15

METHOD FOR EXTRACTING CELLUSOSE, HEMICELLULOSE AND LIGNIN FROM LIGNOCELLULOSE FROM PLANT BIOMASS

#70
20190226153
2019-07-25

Oxidized cellulose containing packaging materials

#71
20190186075
2019-06-20

Process for treating pulp

#72
20190136450
2019-05-09

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#73
20190112758
2019-04-18

A LOW VISCOSITY KRAFT FIBER HAVING AN ENHANCED CARBOXYL CONTENT AND METHODS OF MAKING AND USING THE SAME

#74
20190024308
2019-01-24

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

#75
20180274172
2018-09-27

Odor control pulp composition

#76
20180266051
2018-09-20

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#77
20180245285
2018-08-30

METHODS OF PRODUCING A PAPER PRODUCT

#78
20180230649
2018-08-16

Methods for reducing content of hexenuronic acids in cellulosic pulp

#79
20180202103
2018-07-19

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#80
20180155871
2018-06-07

METHODS FOR BLEACHING AQUEOUS PULPS AND COMPOSITIONS FOR USE IN THESE METHODS

#81
20180135245
2018-05-17

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

#82
20180127919
2018-05-10

Process for producing increased bulk pulp fibers, pulp fibers obtained, and products incorporating same

#83
20180119346
2018-05-03

Method of making bleached microcrystalline cellulose

#84
20180087216
2018-03-29

REDUCED FURFURAL CONTENT IN POLYACRYLIC ACID CROSSLINKED CELLULOSE FIBERS

#85
20170335515
2017-11-23

Methods of pulp fiber treatment

#86
20170306557
2017-10-26

Methods of producing a paper product

#87
20170298152
2017-10-19

Method of processing and fractionating biomass and use of fractions thus obtained

#88
20170284023
2017-10-05

PROCESS FOR PRETREATING RECLAIMED COTTON FIBERS TO BE USED IN THE PRODUCTION OF MOLDED BODIES FROM REGENERATED CELLULOSE

#89
20170268171
2017-09-21

Low Capital Bleaching of Chemical Pulp

#90
20170198436
2017-07-13

LIGNO CELLULOSIC MATERIALS AND THE PRODUCTS MADE THEREFROM

#91
20170172152
2017-06-22

Ligno cellulosic materials and the products made therefrom

#92
20170145633
2017-05-25

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

#93
20170145632
2017-05-25

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

#94
20170137996
2017-05-18

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

#95
20170073892
2017-03-16

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#96
20170016179
2017-01-19

CATALYTIC BIOMASS CONVERSION

#97
20160326694
2016-11-10

HYDROGEN PEROXIDE COMPOSITIONS FOR THE DELIGNIFICATION OF PLANT MATTER, AND USES THEREOF

#98
20160298294
2016-10-13

Method for delignifying and bleaching pulp

#99
20160273162
2016-09-22

Pineapple leaf fiber fine treatment method

#100
20160237619
2016-08-18

Process for pretreating reclaimed cotton fibers to be used in the production of molded bodies from regenerated cellulose

#101
20160237618
2016-08-18

ENZYMATIC BLEACHING OF PAPER PULP

#102
20160177503
2016-06-23

Reducing content of hexenuronic acids in cellulosic pulp

#103
20160168791
2016-06-16

Methods of producing a paper product

#104
20160168275
2016-06-16

Production of textile from citrus fruit

#105
20160138219
2016-05-19

Compositions for bleaching pulps and their use

#106
20160040362
2016-02-11

Method of making a highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process

#107
20160032524
2016-02-04

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#108
20160002849
2016-01-07

Softwood kraft fiber having an improved α-cellulose content and its use in the production of chemical cellulose products

#109
20150361383
2015-12-17

Enhanced catalyst stability in activated peroxygen and/or alkaline detergent formulations

#110
20150337496
2015-11-26

Bleaching and shive reduction process for non-wood fibers

#111
20150337486
2015-11-26

Bleaching and shive reduction process for non-wood fibers

#112
20150322626
2015-11-12

REDUCED FURFURAL CONTENT IN POLYACRYLIC ACID CROSSLINKED CELLULOSE FIBERS

#113
20150240414
2015-08-27

Chain, continuous and no-waste method for degumming and fiber-separating the ramie

#114
20150136344
2015-05-21

Product and processes from an integrated forest biorefinery

#115
20140371442
2014-12-18

Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same

#116
20140284008
2014-09-25

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

#117
20140274680
2014-09-18

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#118
20140262086
2014-09-18

MODIFIED CELLULOSE FROM CHEMICAL KRAFT FIBER AND METHODS OF MAKING AND USING THE SAME

#119
20140231034
2014-08-21

Enzymatic pretreatment of wood in a method for producing mechanical paper pulp

#120
20140200335
2014-07-17

Catalytic biomass conversion

#121
20140182796
2014-07-03

Product and processes from an integrated forest biorefinery

#122
20140174679
2014-06-26

BCTMP filtrate recycling system and method

#123
20140083633
2014-03-27

Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto

#124
20130248131
2013-09-26

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

#125
20130206349
2013-08-15

Surface treated modified cellulose from chemical kraft fiber and methods of making and using same

#126
20130197461
2013-08-01

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

#127
20130098570
2013-04-25

Bleaching of pulp

#128
20130066291
2013-03-14

Ligno cellulosic materials and the products made therefrom

#129
20130062026
2013-03-14

Process for producing bleached pulp

#130
20130042986
2013-02-21

METHOD FOR PULP BLEACHING

#131
20130000859
2013-01-03

APPARATUS TO ENHANCE FIBER DEVELOPMENT BY ADDITION OF TREATMENT AGENT DURING MECHANICAL PULPING

#132
20120302490
2012-11-29

Bleach catalyst compounds, method for the production thereof and use thereof

#133
20120183772
2012-07-19

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

#134
20120175073
2012-07-12

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

#135
20120097350
2012-04-26

ALKALINE PEROXIDE TREATMENT OF REJECTS IN AN INTERGRATED NEUTRAL-ALKALINE PAPER MILL

#136
20120077726
2012-03-29

GENTLE BLEACHING AGENT

#137
20120067532
2012-03-22

High brightness pulps from lignin rich waste papers

#138
20120028667
2012-02-02

Sum-rate balancing in wireless multicell and multicarrier system

#139
20120006501
2012-01-12

Method for preparing nonwood fiber paper

#140
20110315331
2011-12-29

PROCESS FOR MANUFACTURING PULP, PAPER AND PAPERBOARD PRODUCTS

#141
20110303372
2011-12-15

Process for reducing specific energy demand during refining of thermomechanical and chemi-thermomechanical pulp

#142
20110287275
2011-11-24

Ligno cellulosic materials and the products made therefrom

#143
20110275510
2011-11-10

Process of bleaching

#144
20110232853
2011-09-29

BCTMP filtrate recycling system and method

#145
20110203485
2011-08-25

BLEACHING METHOD

#146
20110174451
2011-07-21

Process for delignifying and bleaching chemical pulp

#147
20110104044
2011-05-05

DIRECT SYNTHESIS OF AQUEOUS HYDROGEN PEROXIDE SOLUTION AT THE SITE OF A PAPER MILL

#148
20110094043
2011-04-28

Method of synthesis of tetradentate amide macrocycle ligand and its metal-complex

#149
20110077354
2011-03-31

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

#150
20110067831
2011-03-24

Process for the bleaching of paper pulp

#151
20100314056
2010-12-16

Process for production of bleached pulp

#152
20100263815
2010-10-21

Multi-stage AP mechanical pulping with refiner blow line treatment

#153
20100236734
2010-09-23

Process for bleaching pulp

#154
20100224333
2010-09-09

METHOD AND CHEMICAL COMPOSITION TO IMPROVE EFFICIENCY OF MECHANICAL PULP

#155
20100191012
2010-07-29

Solid detergent composition

#156
20100186910
2010-07-29

Four stage alkaline peroxide mechanical pulpings

#157
20100183533
2010-07-22

Detergent composition

#158
20100126680
2010-05-27

Method for controlling enzymatic decomposition of peroxide

#159
20100108275
2010-05-06

Polymer composition for peroxide bleaching of cellulosic fibre material and processes for peroxide bleaching

#160
20100101743
2010-04-29

Process for the bleaching of paper pulp

#161
20100101029
2010-04-29

Bleaching of substrates

#162
20090242152
2009-10-01

Bleaching process of chemical pulp

#163
20090205795
2009-08-20

Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents

#164
20090205143
2009-08-20

Process of bleaching

#165
20090183845
2009-07-23

Process for producing bleached pulp

#166
20090151880
2009-06-18

Method and system to enhance fiber development by addition of treatment agent during mechanical pulping

#167
20090145562
2009-06-11

Process for manufacturing pulp, paper and paperboard products

#168
20090126121
2009-05-21

Bleaching of substrates

#169
20090068282
2009-03-12

Use of metal complex compounds as oxidation catalysts

#170
20090054863
2009-02-26

Chemical activation and refining of southern pine kraft fibers

#171
20090044345
2009-02-19

Use of Metal Complex Compounds as Oxidation Catalysts

#172
20090032208
2009-02-05

Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone

#173
20090032207
2009-02-05

Process for producing mechanical pulp suitable for paper or cardboard making

#174
20090025893
2009-01-29

Method for determining the total peroxide content of pulp suspension

#175
20080289783
2008-11-27

Method of degumming cellulosic fibres

#176
20080264584
2008-10-30

Composition and process for the treatment of fibre material

#177
20080262225
2008-10-23

Use of metal complex compounds as oxidation catalysts

#178
20080110584
2008-05-15

Bleaching process with at least one extraction stage

#179
20080105393
2008-05-08

Process for the Enzymatic Oxidation of a Substrate Comprising a Primary Hydroxyl Group

#180
20080078516
2008-04-03

ARUNDO DONAX PAPER PRODUCT

#181
20080066878
2008-03-20

Process for manufacturing pulp, paper and paperboard products

#182
20080035287
2008-02-14

Process for the treatment of fibre material and new composition

#183
20070277947
2007-12-06

Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents

#184
20070272378
2007-11-29

Method for Reducing the Extractives Content of High-Yield Pulps and Method for Producing Bleached High-Yield Pulps

#185
20070158040
2007-07-12

Method and apparatus for estimating an optimal dosage of bleaching agent to be used in a process for producing pulp

#186
20070119556
2007-05-31

Chemical activation and refining of southern pine kraft fibers

#187
20070095492
2007-05-03

Manufacturing method of semichemical mechanical pulp from cornstalk

#188
20070079944
2007-04-12

Product and processes from an integrated forest biorefinery

#189
20070056702
2007-03-15

Arundo donax pulp, paper products and particle board

#190
20060264633
2006-11-23

Use of metal complex compounds as oxidation catalysts

#191
20060260773
2006-11-23

Lignocellulosic materials and the products made therefrom

#192
20060207734
2006-09-21

Chemical oxidation for cellulose separation with a hypochlorite and peroxide mixture

#193
20060144534
2006-07-06

Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser

#194
20060131539
2006-06-22

Polymer composition for peroxide bleaching of cellulosic fibre material and processes for peroxide bleaching

#195
20060124257
2006-06-15

Method for bleaching mechanically defibered pulp

#196
20060081346
2006-04-20

Peroxide bleaching of wood pulp

#197
20060081345
2006-04-20

Method for bleaching wood fibers

#198
20060054292
2006-03-16

Method for producing non-paper pulp natural fibers of paper pulp molded products

#199
20050279467
2005-12-22

Process for high temperature peroxide bleaching of pulp with cool discharge

#200
20050269049
2005-12-08

Light-stable and process-stable lignocellulosic materials and their production

#201
20050223501
2005-10-13

Method for making bleached crosslinked cellulosic fibers with high color and brightness

#202
20050217813
2005-10-06

Methods to enhance brightness of pulp and optimize use of bleaching chemicals

#203
20050217812
2005-10-06

Bleached crosslinked cellulosic fibers with high color and brightness

#204
20050126726
2005-06-16

Method for making Arundo donax paper product

#205
20050123734
2005-06-09

Arundo donax pulp and related methods

#206
20050123733
2005-06-09

Arundo donax paper product

#207
20050098279
2005-05-12

Method for bleaching mechanically defibered pulp

#208
20050061455
2005-03-24

Chemical activation and refining of southern pine kraft fibers

#209
18442895
2024-09-24

Method of forming glass-like sheets using date palm seeds