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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:

Class Number Class Name Patents
162/90 Alkali metal, ammonium, alkaline earth metal or magnesium hydroxide or carbonate 216
162/87 Chlorine containing 50
162/79 Heavy metal or aluminum containing 77
162/81 Nitrogen oxide, acid, or salt thereof 46
162/72 Organic 407
162/78 Per-compound (e.g., peroxide, perborate) 334
162/80 Phosphorus, boron or silicon containing 99
162/82 Sulfur containing 113
162/71 Treatment of ground-wood or sawdust 58

Patents under this class:
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Patent Number Title Of Patent Date Issued
8668806 Product and processes from an integrated forest biorefinery Mar. 11, 2014
8617355 Method and apparatus for mixing a lignocellulosic material with enzymes Dec. 31, 2013
8617356 Compositions and processes for paper Dec. 31, 2013
8524474 Process for producing a concentrated sugar solution by enzymatic saccharification of polysaccharide enriched biomass Sep. 3, 2013
8486228 Lignocellulosic biomass saccharification pre-treatment device Jul. 16, 2013
8440052 Method and arrangement for feeding chemicals into a pulp process stream May. 14, 2013
8317975 Product and processes from an integrated forest biorefinery Nov. 27, 2012
8308900 Methods to control lipophilic extractives in acacia wood pulp and fiber Nov. 13, 2012
8268122 Process of producing high-yield pulp Sep. 18, 2012
8262858 Compositions and processes for paper production Sep. 11, 2012
8246780 Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paper Aug. 21, 2012
8007635 Lignocellulosic materials and the products made therefrom Aug. 30, 2011
7972476 Method for the production of tissue paper Jul. 5, 2011
7943009 Process of treating a lignocellulosic material with an alkali metal borate pre-extraction step May. 17, 2011
7914646 Compositions and processes for paper production Mar. 29, 2011
7850821 Household thin paper Dec. 14, 2010
7837830 Plant seed based fiber products and processes Nov. 23, 2010
7807021 Compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process Oct. 5, 2010
7648032 Effective reductive bleaching of mineral slurries Jan. 19, 2010
7638016 Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness Dec. 29, 2009
7585387 Chemical oxidation for cellulose separation with a hypochlorite and peroxide mixture Sep. 8, 2009
7501043 Steam treatment of chips with the addition of an acid liquid Mar. 10, 2009
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

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