ClassID:

126410

D21C9/1084 - 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 reducing compounds

Sub-classes:
Recent Application in this class:
#1
20230167604
2023-06-01

High efficiency fiber bleaching process

#2
20220298725
2022-09-22

CELLULOSE MATERIAL PLASTICIZATION AND VISCOSITY CONTROLLED CELLULOSIC MATERIAL

#3
20220267957
2022-08-25

METHOD FOR MANUFACTURING BLEACHED PULP, FEEDSTOCK, AND PACKAGING SYSTEM

#4
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#5
20210079594
2021-03-18

High efficiency fiber bleaching process

#6
20200332466
2020-10-22

BLEACHING AND SHIVE REDUCTION PROCESS FOR NON-WOOD FIBERS

#7
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#8
20150337486
2015-11-26

Bleaching and shive reduction process for non-wood fibers

#9
20140259458
2014-09-18

Processes and compositions for brightness improvement in paper production

#10
20130206350
2013-08-15

Method for improving brightness in bleached pulp

#11
20130062026
2013-03-14

Process for producing bleached pulp

#12
20120211185
2012-08-23

Compositions and processes for paper

#13
20100132898
2010-06-03

Process for the production of bleached wood particles and pale to white wood-base materials

#14
20090183845
2009-07-23

Process for producing bleached pulp

#15
20080087390
2008-04-17

MULTI-STEP PULP BLEACHING

#16
20070246176
2007-10-25

Pulp Bleaching Processes

#17
20070199668
2007-08-30

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#18
20070151680
2007-07-05

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#19
20070131365
2007-06-14

Method of brightness enhancement

#20
20070062653
2007-03-22

Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paper

#21
20060249265
2006-11-09

Treatment of cellulose during bleaching with agent capable of reducing carbonyl groups

#22
20060229393
2006-10-12

Compositions and methods for enhancing brightness and brightness stabilization in papermaking

#23
20060081346
2006-04-20

Peroxide bleaching of wood pulp

#24
20060081345
2006-04-20

Method for bleaching wood fibers