ClassID:

126420

D21C9/153 - 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 oxygen or its allotropic modifications with ozone

Recent Application in this class:
#1
20260117462
2026-04-30

METHOD AND SYSTEM FOR RECYCLING TEXTILE MATERIAL

#2
20250283276
2025-09-11

SYSTEM FOR DECOLORIZATION OF MATERIAL COMPRISING CELLULOSE

#3
20250171958
2025-05-29

A Bleaching Process

#4
20230392320
2023-12-07

METHOD FOR BLEACHING PULP FROM RECYCLED TEXTILE MATERIAL

#5
20230349098
2023-11-02

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

#6
20220074138
2022-03-10

Method for producing softwood-derived pulp fibers for paper and softwood-derived pulp fibers for paper

#7
20210062420
2021-03-04

Method for preparing dissolving pulp by TCF bleaching of poplar KP

#8
20210062419
2021-03-04

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

#9
20200376718
2020-12-03

Recycled pulp, absorbent, non-woven fabric, and sanitary article

#10
20200217013
2020-07-09

Method for manufacturing recycled pulp from used sanitary products

#11
20200173104
2020-06-04

Method for manufacturing recycled pulp from used sanitary products

#12
20200063293
2020-02-27

Cellulose fibers

#13
20190271112
2019-09-05

Method for lignin depolymerisation

#14
20190249363
2019-08-15

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

#15
20190010051
2019-01-10

Ozone generator with position-dependent discharge distribution

#16
20180134994
2018-05-17

APPARATUS AND METHOD FOR THE TREATMENT OF A SUBSTRATE WITH OZONE BUBBLES

#17
20170350072
2017-12-07

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

#18
20170314197
2017-11-02

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

#19
20170305037
2017-10-26

Method for manufacturing recycled pulp from used sanitary article

#20
20170284023
2017-10-05

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

#21
20170198439
2017-07-13

Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products

#22
20170175329
2017-06-22

METHODS FOR OXYGEN DELIGNIFICATION AND OZONE BLEACHING OF PULP

#23
20170107667
2017-04-20

Method for manufacturing recycled pulp from used sanitary products

#24
20160237619
2016-08-18

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

#25
20160130751
2016-05-12

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

#26
20150126728
2015-05-07

Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products

#27
20120118518
2012-05-17

METHOD FOR MANUFACTURING PAPERMAKING PULP

#28
20120006501
2012-01-12

Method for preparing nonwood fiber paper

#29
20110265964
2011-11-03

Process in a (D) stage bleaching of softwood pulps in a presence of Mg(OH)2

#30
20110240238
2011-10-06

Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base

#31
20110214825
2011-09-08

METHOD FOR MANUFACTURING MECHANICAL PULP AND USE OF THE MECHANICAL PULP

#32
20110036523
2011-02-17

METHOD FOR MANUFACTURING MECHANICAL PULP

#33
20100314056
2010-12-16

Process for production of bleached pulp

#34
20100243183
2010-09-30

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

#35
20100224336
2010-09-09

PROCESS OF BLEACHING A WOOD PULP

#36
20100065233
2010-03-18

Method for bleaching chemical paper pulps by final ozone treatment at high temperature

#37
20090032208
2009-02-05

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

#38
20090000751
2009-01-01

Bleaching process with at least one extraction stage

#39
20080142175
2008-06-19

Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base

#40
20080142174
2008-06-19

Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base

#41
20070295462
2007-12-27

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

#42
20070131364
2007-06-14

Process for treating a cellulose-lignin pulp

#43
20050173082
2005-08-11

Bleaching of medium consistency pulp with ozone without high shear mixing

#44
20050155729
2005-07-21

Method for ozone treatment of used paper

#45
20050121158
2005-06-09

Method and system for the treatment of pulp prior to ozone bleaching

#46
20050109475
2005-05-26

Method for ozone treatment of a liquid phase containing solid particles

#47
20050067122
2005-03-31

Methods of processing lignocellulosic pulp with cavitation

#48
20050034825
2005-02-17

Ozone bleaching of low consistency pulp