ClassID:

126391

D21C9/08 - 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 Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching

Sub-classes:
Recent Application in this class:
#1
20260103840
2026-04-16

BIOCIDAL COMPOSITIONS

#2
20250270761
2025-08-28

Method for Producing Lignocellulose Nanofibrils From Phosphorylated Fibers

#3
20250231168
2025-07-17

ESTIMATION DEVICE, ESTIMATION SYSTEM, ESTIMATION PROGRAM, AND ESTIMATION METHOD

#4
20250043508
2025-02-06

PROCESSES AND SYSTEMS FOR PRODUCING NANOCELLULOSE FROM OLD CORRUGATED CONTAINERS

#5
20240200276
2024-06-20

DEVICE AND METHOD FOR SIMULTANEOUSLY PRODUCING A PLURALITY OF CONTAINERS COMPRISING FIBERS

#6
20230220622
2023-07-13

Process for refining fiber and deriving chemical co-products from biomass

#7
20220290369
2022-09-15

Fractionation of lignocellulosic biomass using maleic acid at low temperature

#8
20220081833
2022-03-17

PREPARATION OF CELLULOSE FIBERS

#9
20220049419
2022-02-17

Fractionation of lignocellulosic biomass using maleic acid at low temperature

#10
20210148048
2021-05-20

Processes and systems for producing nanocellulose from old corrugated containers

#11
20200102701
2020-04-02

Method of directed fouling of a substance onto a selected surface

#12
20200095730
2020-03-26

Method for manufacturing a fibrous web

#13
20200063339
2020-02-27

Composition of matter effluent from refiner of a wet laid process

#14
20200040526
2020-02-06

BIOCIDAL COMPOSITIONS

#15
20190301096
2019-10-03

Use of mesoporous silica

#16
20190256377
2019-08-22

HYDROPHOBISED CALCIUM CARBONATE PARTICLES

#17
20190226147
2019-07-25

High bulk tissue comprising cross-linked fibers

#18
20190177913
2019-06-13

Removal of stickies in the recycling of paper and paperboard

#19
20180363249
2018-12-20

Methods to reduce rewinder breaks during paper production from recycled paper furnish

#20
20180202102
2018-07-19

METHOD FOR CLEAN FIBER RECOVERY FROM CONTAMINATED ARTICLES

#21
20180155872
2018-06-07

Method of improving paper machine forming wire, felt and woven dryer belt performance by the application of peroxide containing solutions

#22
20180119345
2018-05-03

Process for producing a pulp

#23
20180073194
2018-03-15

Method for producing cellulose filaments with less refining energy

#24
20180023251
2018-01-25

Method of directed fouling of a substance onto a selected surface

#25
20170335514
2017-11-23

Method for controlling the deposition of stickies in pulping and papermaking processes

#26
20170314203
2017-11-02

Method and composition for detackifying organic contaminants in the process of pulping and papermaking

#27
20170121906
2017-05-04

Methods for the production of high alpha-cellulose pulp

#28
20170073891
2017-03-16

Method for producing paper, and pitch removal agent

#29
20170009100
2017-01-12

Methods for inhibiting the deposition of organic contaminates in pulp and papermaking systems

#30
20160273162
2016-09-22

Pineapple leaf fiber fine treatment method

#31
20160245757
2016-08-25

A Method of Controlling Hydrophobic Contaminants by Utilizing a Fluorescent Dye

#32
20160222585
2016-08-04

Device and method for processing composite materials containing fibers

#33
20160168796
2016-06-16

Process for making hydrogels from hemicaustic byproduct

#34
20160168790
2016-06-16

Process for obtaining cellulose

#35
20160138219
2016-05-19

Compositions for bleaching pulps and their use

#36
20160130751
2016-05-12

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

#37
20160097157
2016-04-07

System and method using a reaction chamber to beneficiate organic-carbon-containing feedstock for downstream processes

#38
20160032021
2016-02-04

Method of producing regenerated cellulose and hemicellulose

#39
20150345080
2015-12-03

Method of using an anti-soiling agent composition

#40
20150322629
2015-11-12

Method for suppressing pitch formation

#41
20150136343
2015-05-21

Enzymatic treatment of virgin fiber and recycled paper to reduce residual mineral oil levels for paper production

#42
20150044127
2015-02-12

Hydrophobised calcium carbonate particles

#43
20140027079
2014-01-30

Glycerol-based polymers for reducing deposition of organic contaminants in papermaking processes

#44
20140008029
2014-01-09

Method and apparatus for producing product from stock pulp sheet

#45
20130244049
2013-09-19

Environmentally friendly wood treatment process

#46
20130237467
2013-09-12

Emulsions for removal and prevention of deposits

#47
20120225932
2012-09-06

Process for the production of polyamines

#48
20120193050
2012-08-02

Method and assembly for processing cellulose pulp of wood processing industry

#49
20120168104
2012-07-05

Method and apparatus for producing product from stock pulp sheet

#50
20120160438
2012-06-28

Composition for inhibiting calcium salt scale formation

#51
20120073774
2012-03-29

METHOD FOR REDUCING DEPOSITS IN THE DRYING SECTION IN THE MANUFACTURE OF PAPER, PAPERBOARD, AND CARDBOARD

#52
20120043040
2012-02-23

Method of treating paper forming wire surface

#53
20110214825
2011-09-08

METHOD FOR MANUFACTURING MECHANICAL PULP AND USE OF THE MECHANICAL PULP

#54
20110209841
2011-09-01

Process for the control of pitch

#55
20110198048
2011-08-18

Enzymatic hydrolysis of a polymer comprising vinyl acetate monomer

#56
20110094695
2011-04-28

Method of controlling organic contaminants in pulp and paper making processes

#57
20100269994
2010-10-28

METHOD FOR TREATING LIGNO-CELLULOSIC MATERIALS

#58
20100269989
2010-10-28

USE OF 1,3-SELECTIVE LIPASES FOR PITCH CONTROL IN PULP AND PAPER PROCESSES

#59
20100226874
2010-09-09

Biocidal compositions

#60
20100206499
2010-08-19

Methods for Producing Biomass-Based Fuel With Pulp Processing Equipment

#61
20100186736
2010-07-29

Method and apparatus for conveying a cellulosic feedstock

#62
20100170646
2010-07-08

Method of increasing enzyme stability and activity for pulp and paper production

#63
20100051216
2010-03-04

Process for the control of pitch

#64
20100038043
2010-02-18

Pulping additives for a reduction of resin from Kraft pulp

#65
20100024997
2010-02-04

PROCESS FOR THE DERESINATION OF PULP AND USE OF CARBON DIOXIDE OR (BI) CARBONATE THEREFOR

#66
20090312536
2009-12-17

Process for producing a pulp

#67
20090141963
2009-06-04

Method and apparatus for measuring deposition of particulate contaminants in pulp and paper slurries

#68
20090084510
2009-04-02

Methods To Detect Organic Contaminants In Pulp and Fiber

#69
20090065159
2009-03-12

CHEMICAL PULP TREATMENT COMPOSITIONS AND METHODS

#70
20090029902
2009-01-29

Peptides for binding calcium carbonates and methods of use

#71
20080236770
2008-10-02

Rapid fatty acid assay for use in pulp pitch control

#72
20080210393
2008-09-04

Mediator-Enzyme System for Controlling Pitch Deposits in Pulp and Paper Production

#73
20080185113
2008-08-07

Emulsions

#74
20080149288
2008-06-26

Method for altering the tack of materials

#75
20080135194
2008-06-12

Method for improving the consolidation and dewatering of suspended particulate matter

#76
20080110586
2008-05-15

Process of purifying wood pulp with caustic-borate solution and recovering the purifying chemical

#77
20080078519
2008-04-03

Rapid Fatty Acid Assay for Use in Pulp Pitch Control

#78
20080066879
2008-03-20

Methods to control lipophilic extractives in acacia wood pulp and fiber

#79
20080023160
2008-01-31

Enzymatic hydrolysis of a polymer comprising vinyl acetate monomer

#80
20070295462
2007-12-27

Method for treating pulp in connection with the bleaching of chemical pulp

#81
20070272378
2007-11-29

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

#82
20070261806
2007-11-15

Treatment of Pulp Stocks Using Oxidative Enzymes to Reduce Pitch Deposition

#83
20060160166
2006-07-20

Rapid triglyceride assay for use in pulp pitch control

#84
20060048908
2006-03-09

System for control of stickies in recovered and virgin paper processing

#85
20050039873
2005-02-24

High HLB non-ionic surfactants for use as deposition control agents