ClassID:

126390

D21C9/06 - 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; Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces

Recent Application in this class:
#1
20260049271
2026-02-19

FIBER WASH SYSTEM AND METHOD

#2
20250305214
2025-10-02

LIGNIN REMOVAL FROM LIGNOCELLULOSIC WASTE USING REJECTED BRINE SOLUTION

#3
20230313455
2023-10-05

PROCESS FOR PRODUCTION OF CELLULOSE NANOFIBERS FROM MISCANTHUS X. GIGANTEUS AND COMPOSITES THEREFROM

#4
20230304582
2023-09-28

METHOD AND ARRANGEMENT FOR WASHER SEAL CONTROL

#5
20220412003
2022-12-29

Polymer coated paper recycling process and composition

#6
20220002660
2022-01-06

FIBER WASH SYSTEM AND METHOD

#7
20210252436
2021-08-19

Rotary drum vacuum filter with a throttling valve

#8
20210148047
2021-05-20

Predictive control system and method for brown washing treatment in pulp mills

#9
20210040688
2021-02-11

METHOD OF PRODUCING DISSOLVING PULP

#10
20200063359
2020-02-27

Composition of matter feed to a head box

#11
20190264387
2019-08-29

Apparatus for washing and dewatering pulp, a system for controlling such an apparatus, and a method for processing pulp in such an apparatus

#12
20180273645
2018-09-27

Method for producing hydroxypropyl methyl cellulose

#13
20170183818
2017-06-29

A METHOD OF FEEDING A SEALING MEDIUM INTO A LIQUOR FILTER AND A LIQUOR FILTER

#14
20170087493
2017-03-30

Flat-face valve for pulp rotary drum vacuum washer filter

#15
20170002514
2017-01-05

Method of removing odors from fibrous materials used in forming biocomposite materials

#16
20160305067
2016-10-20

Pulp production arrangement and method

#17
20160215450
2016-07-28

Method of and an arrangement for introducing process liquid from a treatment step to a washing and/or filtering apparatus

#18
20160177507
2016-06-23

Press roll comb plate and related method

#19
20150361617
2015-12-17

Apparatus for washing and/or dewatering of cellulose pulp

#20
20150292639
2015-10-15

Flat-face valve for pulp rotary drum vacuum washer filter and method

#21
20150267342
2015-09-24

Washing apparatus and method for preparation of cellulose fibers for use in manufacture of biocomposite materials

#22
20150128434
2015-05-14

Method and equipment for measuring the filter sectors in disc filters

#23
20140262097
2014-09-18

System for washing and dewatering pulp

#24
20140197093
2014-07-17

Filter segment with a light weight frame

#25
20120298319
2012-11-29

Method for producing cellulose-fiber flat structure

#26
20110303380
2011-12-15

Arrangement for washing and dewatering cellulose pulp

#27
20110233130
2011-09-29

METHOD AND ARRANGEMENT FOR FIXING AN ENDLESS WIRE

#28
20110042026
2011-02-24

Distribution device for feeding of cellulose pulp

#29
20110017646
2011-01-27

Apparatus for washing and dewatering pulp

#30
20100294708
2010-11-25

Apparatus for washing and dewatering pulp

#31
20100276094
2010-11-04

Apparatus for washing and dewatering pulp, a system for controlling such an apparatus, and a method for processing pulp in such an apparatus

#32
20100269997
2010-10-28

Apparatus for washing and dewatering pulp

#33
20100243185
2010-09-30

Apparatus and method for treatment of pulp

#34
20100155007
2010-06-24

Arrangement for washing and dewatering cellulose pulp

#35
20100071864
2010-03-25

Hinged screen plate for drum pulp washer and method for cleaning the plate

#36
20100048371
2010-02-25

Press roll for washing and/or dewatering pulp, and a method for manufacturing or repairing such a press roll

#37
20100024996
2010-02-04

Method and arrangement for the treatment of cellulose pulp

#38
20090301529
2009-12-10

Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with seal removing means

#39
20090229778
2009-09-17

Arrangement for treatment of cellulose pulp

#40
20090120602
2009-05-14

Roll body for a press roll

#41
20090101298
2009-04-23

Arrangement for the treatment of cellulose pulp

#42
20090078382
2009-03-26

Arrangement and Method for Treatment of Cellulose Pulp Involving Means for Seal Adjustment

#43
20090056895
2009-03-05

Method and a device for feeding pulp from a dewatering unit

#44
20080314541
2008-12-25

Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with displaced peripheral valve seals

#45
20080264113
2008-10-30

Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with a reinforcing frame

#46
20080245497
2008-10-09

Arrangement for the treatment of cellulose pulp in a washing apparatus adapted to facilitate service and inspection of the apparatus

#47
20080196848
2008-08-21

Apparatus and method for washing pulps

#48
20080087392
2008-04-17

Vacuum washer drum

#49
20070210015
2007-09-13

Dual Zone Wireless Pulp Washer

#50
20060124259
2006-06-15

Process and arrangement for replacing intra-fiber liquid in fibers with a replacement liquid

#51
20060065378
2006-03-30

Vacuum washer drum

#52
19236299
2025-09-30

Lignin removal from lignocellulosic waste using rejected brine solution