ClassID:

126401

D21C9/1036 - 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; Other features in bleaching processes Use of compounds accelerating or improving the efficiency of the processes

Recent Application in this class:
#1
20250019682
2025-01-16

Xylanase Variants

#2
20230272580
2023-08-31

Oxygen bleaching method of pulp

#3
20230203751
2023-06-29

PROCESS AND APPARATUS FOR PRODUCING BLEACHED CELLULOSE

#4
20230009849
2023-01-12

ODOR CONTROL PULP COMPOSITION

#5
20220267957
2022-08-25

METHOD FOR MANUFACTURING BLEACHED PULP, FEEDSTOCK, AND PACKAGING SYSTEM

#6
20220213648
2022-07-07

Oxygen treatment of high kappa fibers

#7
20210355635
2021-11-18

Dissolving wood pulps and methods of making and using the same

#8
20210355634
2021-11-18

A COMPOSITION FOR USE AS PEROXIDE STABILIZER

#9
20200385928
2020-12-10

Odor control pulp composition

#10
20200347550
2020-11-05

Modified cellulose from chemical kraft fiber and methods of making and using the same

#11
20200340182
2020-10-29

A CELLULOSE PAPER COMPOSITE AND PROCESS FOR PREPARATION THEREOF

#12
20200173112
2020-06-04

Methods of making paper and paper with modified cellulose pulps

#13
20190264388
2019-08-29

Dissolving wood pulps and methods of making and using the same

#14
20190186075
2019-06-20

Process for treating pulp

#15
20190078258
2019-03-14

Method for enhanced oxygen delignification of chemical wood pulps

#16
20190024308
2019-01-24

Modified cellulose from chemical kraft fiber and methods of making and using the same

#17
20180274172
2018-09-27

Odor control pulp composition

#18
20180163344
2018-06-14

Method for reducing pulp viscosity in production of dissolving pulp

#19
20180135245
2018-05-17

Modified cellulose from chemical fiber and methods of making and using the same

#20
20180073197
2018-03-15

Methods of making paper and paper with modified cellulose pulps

#21
20170204566
2017-07-20

Methods of making paper and paper with modified cellulose pulps

#22
20170145633
2017-05-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#23
20170145632
2017-05-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#24
20170137996
2017-05-18

Modified cellulose from chemical kraft fiber and methods of making and using the same

#25
20160298294
2016-10-13

Method for delignifying and bleaching pulp

#26
20160040362
2016-02-11

Method of making a highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process

#27
20160002849
2016-01-07

Softwood kraft fiber having an improved α-cellulose content and its use in the production of chemical cellulose products

#28
20150361385
2015-12-17

Enhanced catalyst stability for alkaline detergent formulations

#29
20150361383
2015-12-17

Enhanced catalyst stability in activated peroxygen and/or alkaline detergent formulations

#30
20150315750
2015-11-05

Methods of making paper and paper with modified cellulose pulps

#31
20150152600
2015-06-04

Method for bleaching pulp

#32
20140284008
2014-09-25

Modified cellulose from chemical kraft fiber and methods of making and using the same

#33
20140259458
2014-09-18

Processes and compositions for brightness improvement in paper production

#34
20140238626
2014-08-28

Method for producing cellulose nanofibers

#35
20130269891
2013-10-17

Process for improving chlorine dioxide bleaching of pulp

#36
20130228297
2013-09-05

Process for producing modified cellulose pulps, cellulose pulp thus obtained and use of biopolymer for producing cellulose pulps

#37
20130126109
2013-05-23

Silicate Free Refiner Bleaching

#38
20130105100
2013-05-02

Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith

#39
20130098570
2013-04-25

Bleaching of pulp

#40
20130062026
2013-03-14

Process for producing bleached pulp

#41
20130042986
2013-02-21

METHOD FOR PULP BLEACHING

#42
20120183772
2012-07-19

Modified cellulose from chemical kraft fiber and methods of making and using the same

#43
20120175073
2012-07-12

Modified cellulose from chemical kraft fiber and methods of making and using the same

#44
20120135506
2012-05-31

Process for producing microfibrillated cellulose

#45
20120077726
2012-03-29

GENTLE BLEACHING AGENT

#46
20120028667
2012-02-02

Sum-rate balancing in wireless multicell and multicarrier system

#47
20120015860
2012-01-19

GENTLE BLEACHING AGENT

#48
20120005839
2012-01-12

GENTLE BLEACHING AGENT

#49
20110315331
2011-12-29

PROCESS FOR MANUFACTURING PULP, PAPER AND PAPERBOARD PRODUCTS

#50
20110275510
2011-11-10

Process of bleaching

#51
20110240239
2011-10-06

Methods to Reduce Metals Content of Bleached Pulp While Reducing Bleaching Cost in a Chemical Pulping Process

#52
20110236335
2011-09-29

Perhydrolase providing improved specific activity

#53
20110174451
2011-07-21

Process for delignifying and bleaching chemical pulp

#54
20110104044
2011-05-05

DIRECT SYNTHESIS OF AQUEOUS HYDROGEN PEROXIDE SOLUTION AT THE SITE OF A PAPER MILL

#55
20110094043
2011-04-28

Method of synthesis of tetradentate amide macrocycle ligand and its metal-complex

#56
20110067831
2011-03-24

Process for the bleaching of paper pulp

#57
20110042022
2011-02-24

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

#58
20110036524
2011-02-17

Method of bleaching a pulp

#59
20110020874
2011-01-27

Simplified method for digestion of cellulosic biomass

#60
20100314056
2010-12-16

Process for production of bleached pulp

#61
20100267110
2010-10-21

Laccases, nucleic acids encoding them and methods for making and using them

#62
20100126680
2010-05-27

Method for controlling enzymatic decomposition of peroxide

#63
20100101029
2010-04-29

Bleaching of substrates

#64
20100084101
2010-04-08

METHOD FOR FUNCTIONALISING CARBOHYDRATES

#65
20100036113
2010-02-11

PROCESS FOR TREATING CELLULOSE PULP USING CARBOXYMETHYCELULOSE AND PULP THUS OBTAINED

#66
20090205795
2009-08-20

Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents

#67
20090205143
2009-08-20

Process of bleaching

#68
20090183845
2009-07-23

Process for producing bleached pulp

#69
20090148923
2009-06-11

Modification of xylanases to increase thermophilicity, thermostability and alkalophilicity

#70
20090145562
2009-06-11

Process for manufacturing pulp, paper and paperboard products

#71
20090126121
2009-05-21

Bleaching of substrates

#72
20090101296
2009-04-23

Near neutral chlorine dioxide bleaching of pulp

#73
20090075330
2009-03-19

Xylanases with enhanced thermophilicity and alkalophilicity

#74
20090068282
2009-03-12

Use of metal complex compounds as oxidation catalysts

#75
20090054863
2009-02-26

Chemical activation and refining of southern pine kraft fibers

#76
20090044345
2009-02-19

Use of Metal Complex Compounds as Oxidation Catalysts

#77
20080262225
2008-10-23

Use of metal complex compounds as oxidation catalysts

#78
20080105393
2008-05-08

Process for the Enzymatic Oxidation of a Substrate Comprising a Primary Hydroxyl Group

#79
20080070284
2008-03-20

Oxidative, Reductive, Hydrolytic and Other Enzymatic Systems for Oxidizing, Reducing, Coating, Coupling or Cross-Linking Natural and Artificial Fiber Materials, Plastic Materials or Other Natural or Artificial Monomer to Polymer Materials

#80
20080066878
2008-03-20

Process for manufacturing pulp, paper and paperboard products

#81
20070277947
2007-12-06

Process for non-chlorine oxidative bleaching of mechanical pulp in the presence of optical brightening agents

#82
20070272378
2007-11-29

Method for Reducing the Extractives Content of High-Yield Pulps and Method for Producing Bleached High-Yield Pulps

#83
20070119556
2007-05-31

Chemical activation and refining of southern pine kraft fibers

#84
20070105112
2007-05-10

Laccases, nucleic acids encoding them and methods for making and using them

#85
20060264633
2006-11-23

Use of metal complex compounds as oxidation catalysts

#86
20060196622
2006-09-07

Method for determining chemical pulp kappa number with visible-near infrared spectrometry

#87
20060185808
2006-08-24

Fixation of optical brightening agents onto papermaking fiber

#88
20060081346
2006-04-20

Peroxide bleaching of wood pulp

#89
20060054290
2006-03-16

Novel catalytic activities of oxidoreductases for oxidation and or bleaching

#90
20050170485
2005-08-04

Culture having phenol oxidase-like activity

#91
20050150619
2005-07-14

Xylanase treatment of chemical pulp

#92
20050061455
2005-03-24

Chemical activation and refining of southern pine kraft fibers