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Class Information
Number: 162/70
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Treatment with particular chemical
Description: Processes in which the fibrous material is treated with a particular, identified treating agent or chemical.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7445691 |
Impregnation of chips with an acid liquid prior to a sulphate pulping process |
Nov. 4, 2008 |
| 7396434 |
Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
Jul. 8, 2008 |
| 7390378 |
Method of curling fiber and absorbent sheet containing same |
Jun. 24, 2008 |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May. 20, 2008 |
| 7294228 |
Biopulp for non-woody fiber plants and biopulping method thereof |
Nov. 13, 2007 |
| 7226525 |
Process for producing very low COD unbleached pulp |
Jun. 5, 2007 |
| 7077931 |
Method and bleaching line with a main conduit for wash liquor |
Jul. 18, 2006 |
| 7018510 |
Process for bio-bleaching of Kraft pulp using bacterial consortia |
Mar. 28, 2006 |
| 6833187 |
Unbleached pulp for lyocell products |
Dec. 21, 2004 |
| 6797113 |
Use of thinnings and other low specific gravity wood for lyocell pulps method |
Sep. 28, 2004 |
| 6790527 |
Lyocell fiber from unbleached pulp |
Sep. 14, 2004 |
| 6733625 |
Method and apparatus for treating pulp |
May. 11, 2004 |
| 6702921 |
Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent |
Mar. 9, 2004 |
| 6685748 |
Enzymatic bleaching of natural non-cotton cellulosic fibers |
Feb. 3, 2004 |
| 6669904 |
Stabilized bromine solutions, method of making and uses thereof for biofouling control |
Dec. 30, 2003 |
| 6669863 |
Anionic cellulose ethers having temperature-dependent associative properties |
Dec. 30, 2003 |
| 6599326 |
Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives |
Jul. 29, 2003 |
| 6500303 |
Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives |
Dec. 31, 2002 |
| 6447644 |
Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives |
Sep. 10, 2002 |
| 6425973 |
Treatment of solid containing material derived from effluent |
Jul. 30, 2002 |
| 6391154 |
Paper web and a method for the production thereof |
May. 21, 2002 |
| 6273995 |
Paper bulking promoter, highly bulky pulp sheet, and process for producing the pulp sheet |
Aug. 14, 2001 |
| 6254724 |
Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives |
Jul. 3, 2001 |
| 6117545 |
Surface-modified cellulose microfibrils, method for making the same, and use thereof as a filler in composite materials |
Sep. 12, 2000 |
| 6086714 |
Process for adjusting the alkalinity of pulp slurry in a broke pulper using carbon dioxide |
Jul. 11, 2000 |
| 6059844 |
Cleaning process |
May. 9, 2000 |
| 6017870 |
Purified cellulase and method of producing |
Jan. 25, 2000 |
| 6004428 |
Process for fiber recovery from bonded fiber webs |
Dec. 21, 1999 |
| 5922579 |
Xylanases and uses thereof |
Jul. 13, 1999 |
| 5770010 |
Pulping process employing nascent oxygen |
Jun. 23, 1998 |
| 5695816 |
Process for the preparation of carbon fiber reinforced carbon composites |
Dec. 9, 1997 |
| 5691193 |
Non-chlorine bleaching of kraft pulp |
Nov. 25, 1997 |
| 5656224 |
Process for the production of a cellulose suspension |
Aug. 12, 1997 |
| 5618385 |
Method of peroxide bleaching of pulp using a peroxide decomposing inactivator |
Apr. 8, 1997 |
| 5603883 |
Process of and apparatus for making celluose products |
Feb. 18, 1997 |
| 5601767 |
Process for the production of a cellulose moulded body |
Feb. 11, 1997 |
| 5565276 |
Anti-falsification paper |
Oct. 15, 1996 |
| 5532164 |
Biological control for wood products |
Jul. 2, 1996 |
| 5525122 |
Process and apparatus for shrinking prepared bonded fiber color printed cellulosic type currency with anhydrous ammonia |
Jun. 11, 1996 |
| 5494748 |
Reinforcement fibers and/or process fibers based on plant fibers |
Feb. 27, 1996 |
| 5429718 |
Polyglycerol antifoam agents in paper processing |
Jul. 4, 1995 |
| 5413631 |
Formation of a cellulose-based premix |
May. 9, 1995 |
| 5232779 |
Reinforcement fibers and/or process fibers based on plant fibers, method for their production, and their use |
Aug. 3, 1993 |
| 4869782 |
Method of producing high bulking anfractuous cellulosic fiber using anhydrous liquid ammonia |
Sep. 26, 1989 |
| 4804440 |
Multistage brightening of high yield and ultra high-yield wood pulps |
Feb. 14, 1989 |
| 4647505 |
Cellulose fibres for cement reinforcement |
Mar. 3, 1987 |
| 4565602 |
Method for treating cellulose obtained from cellulose cooking process |
Jan. 21, 1986 |
| 4338158 |
Pulping in the presence of a protector |
Jul. 6, 1982 |
| 4259147 |
Pulping process |
Mar. 31, 1981 |
| 4096029 |
Cellulosic pulp delignification using an acidic bromine-chlorine mixture |
Jun. 20, 1978 |
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