D21H23/06 - CPC Classification Index

ClassID:

127025 ⎘

D21H23/06 - CPC Classification

Classification description:

Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added; Addition to the pulp; After-treatment of added substances in the pulp Controlling the addition

Sub-classes:

D21H23/08 » by measuring pulp properties, e.g. zeta potential, pH 21
D21H23/12 » by measuring properties of the formed web 6
D21H23/14 » by selecting point of addition or time of contact between components 32

Recent Application in this class:

20230295877

2023-09-21

Method for manufacturing paper and cardboard

20210277602

2021-09-09

Sheet manufacturing apparatus and control method for sheet manufacturing apparatus

20200283960

2020-09-10

Zwitterionic imidazolinium surfactant and use in the manufacture of absorbent paper

20200199819

2020-06-25

Manufacture of absorbent paper with low charge density imidazolinium containing debonder compositions

20180202109

2018-07-19

Manufacture of absorbent paper with low charge density imidazolinium containing debonder compositions

20180202108

2018-07-19

Zwitterionic imidazolinium surfactant and use in the manufacture of absorbent paper

20180187376

2018-07-05

Brown stock wash control

20170342663

2017-11-30

On-line control and reaction process for pH adjustment

20140290884

2014-10-02

Sheet manufacturing apparatus and method for manufacturing sheet

#10

20140124154

2014-05-08

Process for the production of paper and board

#11

20130294996

2013-11-07

Method for treating substrates with halosilanes

#12

20100132900

2010-06-03

METHOD FOR DETERMINING THE BRIGHTNESS OF PAPER PULP

#13

20090242155

2009-10-01

Method and apparatus for paper stock mixing

#14

20050016704

2005-01-27

Method and apparatus for controlling the operation of stock preparation of a paper machine