ClassID:

127034

D21H23/24 - 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 formed paper during paper manufacture

Sub-classes:
Recent Application in this class:
#1
20250223762
2025-07-10

RECYCLABLE CELLULOSIC STRUCTURE WITH METAL ION TREATMENT

#2
20250215645
2025-07-03

FLEXIBLE CALCIUM CARBONATE WITH IMPROVED CALCIUM CARBONATE RETENTION, TISSUE PAPER INCLUDING THE SAME, AND MANUFACTURING METHOD THEREFOR

#3
20250027275
2025-01-23

WIRE TREATMENT FOR DUST CONTROL

#4
20240426060
2024-12-26

METHOD FOR MANUFACTURING A MULTIPLY PAPERBOARD, AND A MULTIPLY PAPERBOARD

#5
20240384475
2024-11-21

CELLULOSIC FIBER MATERIAL AND PROCESS

#6
20240229361
2024-07-11

A method, a paperboard product and use of a foam coater and a subsequent high-consistency metering size press

#7
20240133122
2024-04-25

A method, a paperboard product and use of a foam coater and a subsequent high-consistency metering size press

#8
20240026606
2024-01-25

METHOD FOR SEPARATING CELLULOSIC PARTICULATES OUT OF FIBER SUSPENSIONS AND/OR FILTRATES

#9
20230323603
2023-10-12

FLAME-RESISTANT PAPER FOR RADIO WAVE ABSORBER MEMBER AND PRODUCTION METHOD FOR SAME

#10
20230151545
2023-05-18

Multilayer film comprising highly refined cellulose fibers

#11
20230136850
2023-05-04

FUNCTIONAL PAPER FOR ELECTRONICS PRINTING AND METHODS OF MAKING

#12
20230002976
2023-01-05

Method for coating a fibrous web, and a surface coated fibrous web

#13
20220316140
2022-10-06

MICROFIBRILLATED COATING COMPOSITIONS, PROCESSES AND APPLICATORS THEREFOR

#14
20220251786
2022-08-11

Fiber body forming method and fiber body forming apparatus

#15
20220154406
2022-05-19

Method for preparing green slow-release preservative paper used for fruit and vegetable preservation

#16
20220002947
2022-01-06

BOOK PRINTING PAPER

#17
20210222369
2021-07-22

COATING COMPOSITION FOR PAPER AND PAPERBOARD

#18
20210123187
2021-04-29

COATING COMPOSITION FOR PACKAGING LINER

#19
20200385930
2020-12-10

Fiber body forming method and sheet

#20
20200266450
2020-08-20

Porous electrode substrate and production method therefor

#21
20200165781
2020-05-28

FIBER BODY FORMING METHOD AND FIBER BODY FORMING APPARATUS

#22
20200165780
2020-05-28

Fiber body forming method and fiber body forming apparatus

#23
20200149223
2020-05-14

Softener composition

#24
20200115852
2020-04-16

Polyimide fiber sheet

#25
20190309480
2019-10-10

Foam assisted application of strength additives to paper products

#26
20190112764
2019-04-18

Natural fiber reinforced composite panel and method

#27
20190059441
2019-02-28

CIGARETTE WRAPPER WITH PRINTED CATALYST

#28
20190003125
2019-01-03

Sizing method for making paper and paper prepared thereof

#29
20180142423
2018-05-24

Recording medium

#30
20180105987
2018-04-19

Softener composition

#31
20170328008
2017-11-16

Tissue dust reduction

#32
20170292044
2017-10-12

Cellulosic fiber-based substrate, method of production and use as a substrate for adhesive tapes

#33
20170254021
2017-09-07

Method of increasing paper bulk strength by using a diallylamine acrylamide copolymer in a size press formulation containing starch

#34
20170022669
2017-01-26

Method for producing a mat of cellulose fibres with a controlled level of mineral material for bitumen-impregnated roofing elements, and suitable device

#35
20160362841
2016-12-15

Dispersible non-woven article and methods of making the same

#36
20160222591
2016-08-04

Printable recording media

#37
20160213057
2016-07-28

Coated plug wrap for a smoking article

#38
20160201269
2016-07-14

High molecular weight and high cationic charge glyoxalated polyacrylamide copolymers and their methods of manufacture and use

#39
20160198760
2016-07-14

CIGARETTE WRAPPER WITH PRINTED CATALYST

#40
20160194831
2016-07-07

Food wrap paper and method of manufacturing same

#41
20160097161
2016-04-07

Method of increasing paper strength

#42
20160097160
2016-04-07

Method of increasing paper strength using an amine containing polymer composition

#43
20150354140
2015-12-10

Method of preparing a treated article and treated article formed therefrom

#44
20150216374
2015-08-06

Dispersible hydroentangled basesheet with triggerable binder

#45
20150041081
2015-02-12

Natural fiber reinforced composite panel and method

#46
20140299286
2014-10-09

Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability

#47
20140290883
2014-10-02

Method of preparing a treated article and treated article formed therefrom

#48
20140262096
2014-09-18

Method for modifying the physical and/or chemical characteristics of a fibrous band and apparatus for carrying out the method

#49
20140231036
2014-08-21

Fibre product for packaging

#50
20130180678
2013-07-18

Method of preparing a treated article and treated article formed therefrom

#51
20130025806
2013-01-31

Systems and methods for making fiber webs

#52
20120031577
2012-02-09

Fluorometric method for monitoring surface additives in a papermaking process

#53
20120012265
2012-01-19

Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability

#54
20110186255
2011-08-04

Apparatus for making a composite blind slat

#55
20110146928
2011-06-23

PAPERS FOR LIQUID ELECTROPHOTOGRAPHIC PRINTING AND METHOD FOR MAKING SAME

#56
20100276095
2010-11-04

Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability

#57
20100263817
2010-10-21

Process for producing tissue products

#58
20100119714
2010-05-13

METHOD AND DEVICE FOR PRODUCING AN AT LEAST ESSENTIALLY WOOD-FREE COATED PAPER WEB

#59
20100043991
2010-02-25

Papers having borate-based complexing and method of making same

#60
20090294080
2009-12-03

GLOSSY PAPER

#61
20090126888
2009-05-21

FLUOROMETRIC METHOD FOR MONITORING SURFACE ADDITIVES IN A PAPERMAKING PROCESS

#62
20090014141
2009-01-15

Papers for liquid electrophotographic printing and method for making same

#63
20080190578
2008-08-14

Alkanolamine-stabilized dispersed rosin sizing agents and their preparation

#64
20080190577
2008-08-14

Alkanolamine-stabilized dispersed rosin sizing agents and their preparation

#65
20080179026
2008-07-31

Apparatus and method for manufacturing security paper

#66
20080135195
2008-06-12

Process for producing tissue products

#67
20080063958
2008-03-13

Recording sheet and image recording method using the same

#68
20080035292
2008-02-14

Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability

#69
20070095358
2007-05-03

Cigarette wrapper with printed catalyst

#70
20060292952
2006-12-28

Fiber mat and process for making same

#71
20050230074
2005-10-20

Paper product and method therefor using molten wax suspension

#72
20050133182
2005-06-23

Paper product and method of making field

#73
20050056391
2005-03-17

Papers having borate-based complexing and method of making same

#74
20050051185
2005-03-10

Cigarette wrapper with catalytic filler and methods of making same

#75
20050003223
2005-01-06

Recording sheet and image recording method using the same

#76
14169859
2015-04-14

Dispersible hydroentangled basesheet with triggerable binder