ClassID:

126417

D21C9/142 - 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 in a multistage process involving ClO/Cl exclusively

Recent Application in this class:
#1
20230212821
2023-07-06

METHOD FOR PITCH CONTROL DURING BLEACHING

#2
20230046123
2023-02-16

Process for producing refined cotton with high polymerization degree

#3
20220106737
2022-04-07

A method of replacing sodium losses in a pulp mill, a method of producing bleached cellulosic pulp, and a system

#4
20210139613
2021-05-13

METHOD FOR PRODUCTION OF CELLULOSE NANOCRYSTALS FROM MISCANTHUS GIGANTEUS AND COMPOSITES THEREFROM

#5
20190136450
2019-05-09

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#6
20190112758
2019-04-18

A LOW VISCOSITY KRAFT FIBER HAVING AN ENHANCED CARBOXYL CONTENT AND METHODS OF MAKING AND USING THE SAME

#7
20180265598
2018-09-20

Method for production of cellulose nanocrystals from and composites therefrom

#8
20180202103
2018-07-19

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#9
20170096774
2017-04-06

Measurement apparatus and method

#10
20170073892
2017-03-16

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#11
20160319043
2016-11-03

Method for production of cellulose nanocrystals from and composites therefrom

#12
20160032524
2016-02-04

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#13
20140274680
2014-09-18

Low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same

#14
20130269891
2013-10-17

Process for improving chlorine dioxide bleaching of pulp

#15
20110042022
2011-02-24

Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide

#16
20100314056
2010-12-16

Process for production of bleached pulp

#17
20080087394
2008-04-17

Bleaching of pulp

#18
20060118260
2006-06-08

Bleaching of cellulose pulp in a first chlorine dioxide bleaching step