ClassID:

126414

D21C9/123 - 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

Recent Application in this class:
#1
20220127789
2022-04-28

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

#2
20200181839
2020-06-11

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

#3
20190062999
2019-02-28

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

#4
20180266051
2018-09-20

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

#5
20180245285
2018-08-30

METHODS OF PRODUCING A PAPER PRODUCT

#6
20170370048
2017-12-28

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

#7
20170335515
2017-11-23

Methods of pulp fiber treatment

#8
20170306557
2017-10-26

Methods of producing a paper product

#9
20170096774
2017-04-06

Measurement apparatus and method

#10
20160237618
2016-08-18

ENZYMATIC BLEACHING OF PAPER PULP

#11
20160168791
2016-06-16

Methods of producing a paper product

#12
20140371442
2014-12-18

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

#13
20140318725
2014-10-30

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

#14
20140069599
2014-03-13

Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith

#15
20130105100
2013-05-02

Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith

#16
20100252213
2010-10-07

PULP AND PAPER HAVING INCREASED BRIGHTNESS

#17
20070193707
2007-08-23

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

#18
20070079944
2007-04-12

Product and processes from an integrated forest biorefinery

#19
20070051483
2007-03-08

Process for Bleaching Kraft Pulp

#20
20050133173
2005-06-23

Process for bleaching Kraft pulp

#21
20050051288
2005-03-10

Extended retention and medium consistency pulp treatment