TREA

the same pulping agent being used in all stages

Follow

Industry

  • CPC
  • D21C3/266
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

DTEXTILES PAPER D21Papermaking D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS APPARATUS THEREFOR D21C3/00Pulping cellulose-containing materials

Current Industry

D21C3/266the same pulping agent being used in all stages
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    System and method for reclaiming rejects in sulfite pulping
    • Patent number 8,877,007
    • Issue date Nov 4, 2014
    • University of New Brunswick
    • Yonghao Ni
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Apparatus for pulping sawdust
    • Patent number 6,379,504
    • Issue date Apr 30, 2002
    • Andritz Inc.
    • Jay J. Miele
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Batch cooking with black liquor pretreatment
    • Patent number 6,350,348
    • Issue date Feb 26, 2002
    • Andritz-Ahlstrom Oy
    • Kaj Henricson
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for pulping sawdust
    • Patent number 6,325,888
    • Issue date Dec 4, 2001
    • Andritz-Ahlstrom Inc.
    • Jay J. Miele
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Cooking cellulose material using high alkali concentrations and/or...
    • Patent number 5,779,856
    • Issue date Jul 14, 1998
    • Ahlstrom Machinery Inc.
    • Auvo K. Kettunen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Cooking cellulose material with high alkali concentrations and/or h...
    • Patent number 5,635,026
    • Issue date Jun 3, 1997
    • Ahlstrom Machinery Inc.
    • Auvo K. Kettunen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method and apparatus for pulping cellulosic material using a vessel...
    • Patent number 5,500,084
    • Issue date Mar 19, 1996
    • Hoffman Environmental Systems, Inc.
    • Roger P. Hoffman
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    System for sulfonating mechanical pulp fibers
    • Patent number 5,089,089
    • Issue date Feb 18, 1992
    • Bear Island Paper Company
    • Serge B. Beaulieu
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Batch digester multi-stage pulping process
    • Patent number 4,849,052
    • Issue date Jul 18, 1989
    • Beloit Corporation
    • Ralph S. Grant
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Two stage process for sulfonating mechanical pulp fibers
    • Patent number 4,708,771
    • Issue date Nov 24, 1987
    • Bear Island Paper Company
    • Serge B. Beaulieu
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Two-stage chemical treatment of mechanical wood pulp with sodium su...
    • Patent number 4,502,918
    • Issue date Mar 5, 1985
    • MacMillan Bloedel Limited
    • David M. Mackie
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Process for preparing chemical cellulose according to the sulfite p...
    • Patent number 4,141,787
    • Issue date Feb 27, 1979
    • PWA Papierwerke Waldhof-Aschaffenburg Aktiengesellschaft
    • Reinhold Schadler
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Sodium sulfide pulping with hydrogen sulfide generation
    • Patent number 4,113,553
    • Issue date Sep 12, 1978
    • Mo och Domsjo Aktiebolag
    • Hans Olof Samuelson
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3383277
    • Patent number 3,383,277
    • Issue date May 14, 1968
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3092535
    • Patent number 3,092,535
    • Issue date Jun 4, 1963
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    3088861
    • Patent number 3,088,861
    • Issue date May 7, 1963
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2849315
    • Patent number 2,849,315
    • Issue date Aug 26, 1958
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2835574
    • Patent number 2,835,574
    • Issue date May 20, 1958
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2639986
    • Patent number 2,639,986
    • Issue date May 26, 1953
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2639987
    • Patent number 2,639,987
    • Issue date May 26, 1953
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2607679
    • Patent number 2,607,679
    • Issue date Aug 19, 1952
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2607680
    • Patent number 2,607,680
    • Issue date Aug 19, 1952
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2601408
    • Patent number 2,601,408
    • Issue date Jun 24, 1952
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2267087
    • Patent number 2,267,087
    • Issue date Dec 23, 1941
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2047314
    • Patent number 2,047,314
    • Issue date Jul 14, 1936
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    2029973
    • Patent number 2,029,973
    • Issue date Feb 4, 1936
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    1977879
    • Patent number 1,977,879
    • Issue date Oct 23, 1934
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    1896344
    • Patent number 1,896,344
    • Issue date Feb 7, 1933
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    1880044
    • Patent number 1,880,044
    • Issue date Sep 27, 1932
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    1880042
    • Patent number 1,880,042
    • Issue date Sep 27, 1932
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents