ClassID:

126416

D21C9/14 - 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 halogens or halogen-containing compounds with ClO or chlorites

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

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#2
20250314012
2025-10-09

USE OF CELLULASE TO IMPROVE VISCOSITY CONTROL OF KRAFT DISSOLVING PULP

#3
20250116064
2025-04-10

Bleaching Trichomes to Remove Proteins

#4
20240337069
2024-10-10

HEMP PAPER PACKAGING MATERIAL FOR FOODSTUFF

#5
20240208815
2024-06-27

PORPHYRAZINES AS EFFICIENT, CATALYTIC AND SCALABLE METHOD TO PRODUCE CHLORINE DIOXIDE

#6
20240084507
2024-03-14

Juncao pulp for spinning and preparation method and use thereof

#7
20240052567
2024-02-15

Bleaching trichomes to remove proteins

#8
20230349098
2023-11-02

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

#9
20230009849
2023-01-12

ODOR CONTROL PULP COMPOSITION

#10
20220349123
2022-11-03

Bleaching trichomes to remove proteins

#11
20220220225
2022-07-14

A method of treating a cellulosic material, a method of preparing a hydrolysed cellulosic material, use of a chlorite salt and gaseous pressurized HCl, use of chlorous acid, and a hydrolysed cellulosic material

#12
20220098037
2022-03-31

Porphyrazines as efficient, catalytic and scalable method to produce chlorine dioxide

#13
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#14
20200385928
2020-12-10

Odor control pulp composition

#15
20200332087
2020-10-22

A Lignin-Containing Cellulose Nanofiber, a Paper and a Film Comprising the Said Lignin-Containing Cellulose Nanofiber

#16
20200002887
2020-01-02

Bleaching trichomes to remove proteins

#17
20190345672
2019-11-14

Method for bleaching paper pulp

#18
20190271112
2019-09-05

Method for lignin depolymerisation

#19
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#20
20190257031
2019-08-22

Use of Cellulase to improve Viscosity Control of Dissolving Pulp

#21
20190256355
2019-08-22

Iron porphyrazines as efficient, catalytic and scalable method to produce chlorine dioxide

#22
20180274172
2018-09-27

Odor control pulp composition

#23
20180186634
2018-07-05

Oxidative method

#24
20180135245
2018-05-17

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

#25
20180127919
2018-05-10

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

#26
20180094384
2018-04-05

Oxidative method

#27
20180030651
2018-02-01

METHOD AND COMPOSITIONS FOR OXYGEN DELIGNIFICATION OF CHEMICAL PULP

#28
20170350072
2017-12-07

Enzymatic process combined with hot caustic extraction for the removal of hemicelluloses from paper-grade pulp

#29
20170314197
2017-11-02

PROCESS FOR THE PRODUCTION OF A TREATED PULP, TREATED PULP, AND TEXTILE FIBRES PRODUCED FROM THE TREATED PULP

#30
20170268171
2017-09-21

Low Capital Bleaching of Chemical Pulp

#31
20170096774
2017-04-06

Measurement apparatus and method

#32
20160340189
2016-11-24

Iron porphyrazines as efficient, catalytic and scalable method to produce chlorine dioxide

#33
20150152600
2015-06-04

Method for bleaching pulp

#34
20130269891
2013-10-17

Process for improving chlorine dioxide bleaching of pulp

#35
20130081768
2013-04-04

Catalytic carboxylation of cellulose fibers in a continuous process with multiple additions of catalyst, secondary oxidant and base to a moving slurry of cellulose fibers

#36
20130042986
2013-02-21

METHOD FOR PULP BLEACHING

#37
20120193047
2012-08-02

METHODS FOR REDUCING CHLORINE DIOXIDE ASSOCIATED CORROSION

#38
20120006501
2012-01-12

Method for preparing nonwood fiber paper

#39
20110240239
2011-10-06

Methods to Reduce Metals Content of Bleached Pulp While Reducing Bleaching Cost in a Chemical Pulping Process

#40
20110108222
2011-05-12

EFFECT OF LOW DOSE XYLANASE ON PULP IN PREBLEACH TREATMENT PROCESS

#41
20110036524
2011-02-17

Method of bleaching a pulp

#42
20100276093
2010-11-04

Process for fractionating sugarcane bagasse into high α-cellulose pulp, xylan and lignin

#43
20100263816
2010-10-21

Use of chemical pulp mill steam stripper off gases condensate as reducing agent in chlorine dioxide production

#44
20100252213
2010-10-07

PULP AND PAPER HAVING INCREASED BRIGHTNESS

#45
20100243184
2010-09-30

Method for treating liquid flows at a chemical pulp mill

#46
20100243183
2010-09-30

Method in connection with the washing of pulp at a chemical pulp mill

#47
20100224334
2010-09-09

Method for treating liquid flows at a chemical pulp mill

#48
20090114353
2009-05-07

Method of Papermaking

#49
20090000751
2009-01-01

Bleaching process with at least one extraction stage

#50
20080194008
2008-08-14

Methods for Reducing Chlorine Dioxide Associated Corrosion

#51
20080190573
2008-08-14

Chlorine Dioxide Treatment Compositions and Processes

#52
20070295462
2007-12-27

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

#53
20070193707
2007-08-23

Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness

#54
20070095491
2007-05-03

Arundo donax pulp, paper products, and particle board

#55
20060207734
2006-09-21

Chemical oxidation for cellulose separation with a hypochlorite and peroxide mixture

#56
20060201642
2006-09-14

Methods of treating chemical cellulose pulp

#57
20060096722
2006-05-11

Method of treating cellulose fibres with chlorine dioxide and an alkyl cellulose derivative

#58
20060070711
2006-04-06

Low pH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture

#59
20060065377
2006-03-30

High PH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture

#60
20050150619
2005-07-14

Xylanase treatment of chemical pulp

#61
20050045291
2005-03-03

Reduction of organically bound chlorine formed in chlorine dioxide bleaching

#62
15717604
2018-02-20

Synthesis of nanostructures from agro-wastes

#63
15587077
2017-10-03

Excess heat recovery during high temperature pulp bleaching