D21H23/14 - CPC Classification Index

ClassID:

127029 ⎘

D21H23/14 - 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 by selecting point of addition or time of contact between components

Sub-classes:

D21H23/16 » Addition before or during pulp beating or refining 12
D21H23/18 » Addition at a location where shear forces are avoided before sheet-forming, e.g. after pulp beating or refining 8

Recent Application in this class:

20250075432

2025-03-06

STRENGTHENING AGENTS AND PROCESSES FOR MAKING AND USING SAME

20240328089

2024-10-03

METHOD FOR REDUCING STARCH CONTENT OF AN AQUEOUS PHASE REMOVED FROM FIBRE STOCK PREPARATION

20240279154

2024-08-22

PROCESS FOR OBTAINING BIO-SOURCED DIALLYLDIALKYLAMMONIUM HALIDE

20240239933

2024-07-18

METHOD FOR OBTAINING A BIO-SOURCED-MONOMER FROM RENEWABLE DIMETHYLAMINOETHANOL

20200181847

2020-06-11

Dosing of nanocellulose suspension in gel phase

20200002895

2020-01-02

Method of manufacturing a toilet paper

20190024320

2019-01-24

Method for forming a composite comprising MFC and a composite produced by the method

20180363247

2018-12-20

Polymer for pitch and stickies deposition control in papermaking

20170121909

2017-05-04

Wet end chemicals for dry end strength in paper

#10

20150197893

2015-07-16

Wet end chemicals for dry end strength in paper

#11

20150059998

2015-03-05

Furnish pretreatment to improve paper strength aid performance in papermaking

#12

20150027650

2015-01-29

Process for the manufacture of paper and paperboard

#13

20130133847

2013-05-30

Furnish pretreatment to improve paper strength aid performance in papermaking

#14

20130020041

2013-01-24

Method and arrangement for feeding chemicals into a pulp process stream

#15

20120216970

2012-08-30

Composition and method for improving retention and drainage in papermaking processes by activating microparticles with a promoter-flocculant system

#16

20120067535

2012-03-22

Process for improving paper strength

#17

20120067534

2012-03-22

Process for improving paper strength

#18

20100300632

2010-12-02

Method and arrangement for feeding chemicals into a pulp process stream

#19

20100288457

2010-11-18

Process for improving paper strength

#20

20100126683

2010-05-27

Paper Dyeing Process

#21

20090283232

2009-11-19

PAPER AND PAPERBOARD PRODUCTION PROCESS AND CORRESPONDING NOVEL RETENTION AND DRAINAGE AIDS, AND PAPERS AND PAPERBOARDS THUS OBTAINED

#22

20090236065

2009-09-24

Siliceous composition and its use in papermaking

#23

20090025891

2009-01-29

COMPOSITION AND METHOD FOR IMPROVING RETENTION AND DRAINAGE IN PAPERMAKING PROCESSES BY ACTIVATING MICROPARTICLES WITH A PROMOTER-FLOCCULANT SYSTEM

#24

20080257509

2008-10-23

Method for an Arrangement at a Paper Machine

#25

20080128102

2008-06-05

Composition and method for paper processing

#26

20080066880

2008-03-20

Method for paper processing

#27

20070254104

2007-11-01

Support for image recording medium, method of making the support and image recording medium made from the support

#28

20070169903

2007-07-26

Papermaking processes using coagulants and optical brighteners

#29

20060243407

2006-11-02

Paper and paperboard production process and corresponding novel retention and drainage aids, and papers and paperboards thus obtained

#30

20060029752

2006-02-09

Support for image recording medium, method of making the support and image recording medium made from the support

#31

20050161183

2005-07-28

Process for making paper

#32

20050150622

2005-07-14

Paper and paperboard production process and corresponding novel retention aids, and papers and paperboards thus obtained

#33

14157437

2014-11-25

Wet end chemicals for dry end strength