ClassID:

126413

D21C9/12 - 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

Sub-classes:
Recent Application in this class:
#1
20260109646
2026-04-23

COLLAPSIBLE ENGAGEMENT MECHANISM

#2
20250388501
2025-12-25

COMPOSITION AND USE THEREOF

#3
20250137201
2025-05-01

ANTI-MYOPIA PAPER SHEET

#4
20240336526
2024-10-10

Crystalline Cellulose Reinforced Cement

#5
20230016500
2023-01-19

COLLAPSIBLE ENGAGEMENT MECHANISM

#6
20220127789
2022-04-28

Method for producing cellulose pulp, cellulose pulp and use thereof, paper

#7
20210324582
2021-10-21

Multilayered fibrous sheet, a method for making a multilayered fibrous sheet, and use of mechanical pulp

#8
20200340182
2020-10-29

A CELLULOSE PAPER COMPOSITE AND PROCESS FOR PREPARATION THEREOF

#9
20200079692
2020-03-12

Crystalline cellulose reinforced cement

#10
20200077790
2020-03-12

Collapsible engagement mechanism

#11
20190136448
2019-05-09

Method for separating cellulose

#12
20190062999
2019-02-28

Method for producing cellulose pulp, cellulose pulp and use thereof, paper

#13
20180230649
2018-08-16

Methods for reducing content of hexenuronic acids in cellulosic pulp

#14
20160177503
2016-06-23

Reducing content of hexenuronic acids in cellulosic pulp

#15
20150292151
2015-10-15

Method for producing ultrahigh-viscosity refined cotton and device for transporting refined cotton pulp

#16
20150152600
2015-06-04

Method for bleaching pulp

#17
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

#18
20120255692
2012-10-11

Bleach compositions and related methods

#19
20120031575
2012-02-09

Pulp Bleaching and Alkaline Extraction Method

#20
20110240239
2011-10-06

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

#21
20100243184
2010-09-30

Method for treating liquid flows at a chemical pulp mill

#22
20090114353
2009-05-07

Method of Papermaking

#23
20080087390
2008-04-17

MULTI-STEP PULP BLEACHING