ClassID:

126418

D21C9/144 - 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 with ClO/Cl and other bleaching agents in a multistage process

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

METHOD AND SYSTEM FOR RECYCLING TEXTILE MATERIAL

#2
20230366150
2023-11-16

TREATED KRAFT PULP COMPOSITIONS AND METHODS OF MAKING THE SAME

#3
20230142284
2023-05-11

TREATED KRAFT PULP COMPOSITIONS AND METHODS OF MAKING THE SAME

#4
20220267957
2022-08-25

METHOD FOR MANUFACTURING BLEACHED PULP, FEEDSTOCK, AND PACKAGING SYSTEM

#5
20200347550
2020-11-05

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

#6
20200283954
2020-09-10

METHOD OF CONTROLLING THE CHEMICAL BALANCE OF A PULP MILL

#7
20190249363
2019-08-15

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

#8
20190242060
2019-08-08

Treated Kraft pulp compositions and methods of making the same

#9
20190024308
2019-01-24

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

#10
20180230649
2018-08-16

Methods for reducing content of hexenuronic acids in cellulosic pulp

#11
20180135245
2018-05-17

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

#12
20180094384
2018-04-05

Oxidative method

#13
20170370048
2017-12-28

Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same technical field

#14
20170145633
2017-05-25

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

#15
20170145632
2017-05-25

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

#16
20170137996
2017-05-18

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

#17
20160177503
2016-06-23

Reducing content of hexenuronic acids in cellulosic pulp

#18
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

#19
20160002849
2016-01-07

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

#20
20150184338
2015-07-02

TREATED KRAFT PULP COMPOSITIONS AND METHODS OF MAKING THE SAME

#21
20150152600
2015-06-04

Method for bleaching pulp

#22
20140318725
2014-10-30

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

#23
20140284008
2014-09-25

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

#24
20130269891
2013-10-17

Process for improving chlorine dioxide bleaching of pulp

#25
20130248131
2013-09-26

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

#26
20130197461
2013-08-01

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

#27
20130062026
2013-03-14

Process for producing bleached pulp

#28
20120279669
2012-11-08

Method of treating liquid flows at a chemical pulp mill

#29
20120183772
2012-07-19

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

#30
20120175073
2012-07-12

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

#31
20110265964
2011-11-03

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

#32
20110240238
2011-10-06

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

#33
20110174451
2011-07-21

Process for delignifying and bleaching chemical pulp

#34
20100269992
2010-10-28

Sulfonation of pulp produced by alkali pulping process

#35
20090277596
2009-11-12

Bleaching process of chemical pulp

#36
20090242152
2009-10-01

Bleaching process of chemical pulp

#37
20090183845
2009-07-23

Process for producing bleached pulp

#38
20090101296
2009-04-23

Near neutral chlorine dioxide bleaching of pulp

#39
20090032208
2009-02-05

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

#40
20080142175
2008-06-19

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

#41
20080142174
2008-06-19

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

#42
20060090865
2006-05-04

Method of bleaching cellulose pulp and bleaching line therefore

#43
20060090864
2006-05-04

Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate

#44
20050034825
2005-02-17

Ozone bleaching of low consistency pulp