ClassID:

126362

D21C3/26 - CPC Classification

Classification description:

Pulping cellulose-containing materials; Other features of pulping processes Multistage processes

Sub-classes:
Recent Application in this class:
#1
20260055552
2026-02-26

EXTRACTION OF DELIGNIFIED, CELLULOSE-BASED FIBERS FROM NATURAL PLANT MATERIAL, AND MATERIALS INCORPORATING SUCH FIBERS

#2
20250314012
2025-10-09

USE OF CELLULASE TO IMPROVE VISCOSITY CONTROL OF KRAFT DISSOLVING PULP

#3
20250101683
2025-03-27

LOW TEMPERATURE AND LOW PRESSURE PROCESS FOR AGRICULTURAL FEEDSTOCK PREPARATION

#4
20240410109
2024-12-12

A METHOD FOR CHEMICAL PULP PRODUCTION IN A MULTI-STAGE PROCESS

#5
20240401270
2024-12-05

PROCESS FOR TREATMENT OF BIOMASS FOR PULPING AND BIOREFINERY APPLICATIONS

#6
20230203311
2023-06-29

EVAPORATIVE DEVICES HAVING DELIGNIFIED PLANT MATERIALS, AND SYSTEMS AND METHODS FOR FABRICATION AND USE THEREOF

#7
20230160141
2023-05-25

EXTRACTION OF DELIGNIFIED, CELLULOSE-BASED FIBERS FROM NATURAL PLANT MATERIAL, AND MATERIALS INCORPORATING SUCH FIBERS

#8
20230151547
2023-05-18

Multi-step low temperature and low pressure process for agricultural feedstock stock preparation with hemicellulose and lignin recovery

#9
20220389660
2022-12-08

Aramid pulp and method for manufacturing the same

#10
20220018065
2022-01-20

METHOD OF PRODUCING HOLOCELLULOSE AND PAPER STRENGTH AGENT, PROCESS FOR THE PRODUCTION OF PAPER, THE PAPER PRODUCED AND USE OF THE PRODUCED PAPER

#11
20220002944
2022-01-06

Method of feeding wood chips to a prehydrolysis reactor

#12
20210309449
2021-10-07

Outlet system for transporting comminuted lignocellulosic material from a vessel and vessel comprising such an outlet system

#13
20210207321
2021-07-08

METHOD FOR TREATING DISSOLVING PULP

#14
20210180098
2021-06-17

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#15
20210115482
2021-04-22

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#16
20210095421
2021-04-01

Multi-step process for the isolation of components from

#17
20210079593
2021-03-18

Dissolution of cellulose in ionic liquids

#18
20200283953
2020-09-10

Processes and systems for the pulping of lignocellulosic materials

#19
20200270659
2020-08-27

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#20
20200157739
2020-05-21

Biomass, thermal pressure hydrolysis and anaerobic digestion

#21
20200123706
2020-04-23

Method for recovering concentrated hydrolysate after hydrolysis of cellulose material

#22
20200048669
2020-02-13

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#23
20190301094
2019-10-03

Process of producing nanofibrillated cellulose with low energy consumption

#24
20190257031
2019-08-22

Use of Cellulase to improve Viscosity Control of Dissolving Pulp

#25
20190077885
2019-03-14

CELLULOSE ACETATE

#26
20190062794
2019-02-28

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#27
20180163344
2018-06-14

Method for reducing pulp viscosity in production of dissolving pulp

#28
20180135245
2018-05-17

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

#29
20180112355
2018-04-26

METHOD FOR POLYSULFIDE PRODUCTION IN A KRAFT PULP MILL

#30
20180105982
2018-04-19

Processes and systems for the pulping of lignocellulosic materials

#31
20170275818
2017-09-28

Cost efficient kraft cooking method using polysulfide cooking liquor

#32
20170268168
2017-09-21

Method for continuously cooking grass raw materials and device

#33
20170145455
2017-05-25

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#34
20170044584
2017-02-16

Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars

#35
20170022663
2017-01-26

Kraft cooking method using polysulfide cooking liquor

#36
20160222586
2016-08-04

Processes for producing cellulose pulp and pulp-derived products from lignocellulosic biomass

#37
20160186376
2016-06-30

Method for pretreating cellulose pulp

#38
20160153138
2016-06-02

Method for displacement in batch digesters

#39
20160076198
2016-03-17

Systems, devices and methods for agricultural product pulping

#40
20150232804
2015-08-20

Wickerhamonyces anomalus CGMCC#5975 and Its Application Thereof

#41
20150232803
2015-08-20

Bacillus sp. CGMCC#5971 and Its Application Thereof

#42
20150211188
2015-07-30

High yield and enhanced performance fiber

#43
20150204013
2015-07-23

Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester

#44
20140246158
2014-09-04

Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method

#45
20140096923
2014-04-10

PROCESSES FOR PRODUCING CELLULOSE PULP, SUGARS, AND CO-PRODUCTS FROM LIGNOCELLULOSIC BIOMASS

#46
20140096922
2014-04-10

Processes for producing cellulose pulp, sugars, and co-products from lignocellulosic biomass

#47
20140083633
2014-03-27

Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto

#48
20130306256
2013-11-21

High Yield and Enhanced Performance Fiber

#49
20130098569
2013-04-25

Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester

#50
20130062031
2013-03-14

DIGESTER AND DIGESTION PROCESS

#51
20120305209
2012-12-06

HARDWOOD ALKALINE PULPING PROCESSES AND SYSTEMS

#52
20120237989
2012-09-20

SEPARATION OF LIGNIN FROM HYDROLYZATE

#53
20120111515
2012-05-10

Method and device for thermal hydrolysis and steam explosion of biomass

#54
20120041186
2012-02-16

System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process

#55
20120031574
2012-02-09

CHIP FEED AND STEAMING SYSTEM AND METHOD FOR BATCH DIGESTER

#56
20120000621
2012-01-05

Shaped cellulose manufacturing process combined with a pulp mill recovery system

#57
20110186251
2011-08-04

CONTINUOUS TUBE REACTOR

#58
20110094692
2011-04-28

Methods of pretreating comminuted cellulosic material with carbonate-containing solutions

#59
20100326610
2010-12-30

SYSTEM AND METHOD FOR CONTINUOUSLY TREATING BIOMASS

#60
20100263813
2010-10-21

GREEN LIQUOR PRETREATMENT OF LIGNOCELLULOSIC MATERIAL

#61
20100206499
2010-08-19

Methods for Producing Biomass-Based Fuel With Pulp Processing Equipment

#62
20100175840
2010-07-15

HIGH YIELD AND ENHANCED PERFORMANCE FIBER

#63
20100175839
2010-07-15

PROCESS FOR ADJUSTING THE PH OF A CELLULOSIC PULP, PRODUCTION OF PULP OR PAPER FROM CELLULOSIC PULP AND USE OF (BI)CARBONATE REMOVAL FOR REDUCING THE CONSUMPTION OF ACID

#64
20090221814
2009-09-03

System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process

#65
20080302492
2008-12-11

Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method

#66
20080295981
2008-12-04

Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method

#67
20070240837
2007-10-18

Hardwood alkaline pulping processes and systems

#68
20060231222
2006-10-19

METHOD AND APPARATUS TO DECREASE STEAM CONSUMPTION IN CONVENTIONAL BATCH DIGESTERS

#69
20060201640
2006-09-14

Method to optimize temperature profiles displacement batch cooking

#70
20060175029
2006-08-10

Batch process for preparing pulp

#71
20050087314
2005-04-28

Pulp cooking with particular alkali profiles