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Class Information
Number: 162/4
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Waste paper or textile waste
Description: Processes which include the treatment of paper or textile waste such as old newspapers, waste rags, etc.










Sub-classes under this class:

Class Number Class Name Patents
162/8 With alkali metal, alkaline earth metal, or ammonium compound 156
162/6 With chlorine, chlorine compounds, oxygen, ozone, or per-compounds 112
162/5 With organic agent 341
162/7 With sulfur or sulfur compound 62


Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8657995 Method of producing recycled paper pulp from waste printed paper as raw material Feb. 25, 2014
8617353 Deinking process Dec. 31, 2013
8454795 System and method for producing bonded fiber/cellulose products Jun. 4, 2013
8454799 Pulp composition for paper and solid board production Jun. 4, 2013
8444807 Method for preparing paper pulp from recycled paper containing contaminants May. 21, 2013
8317974 Deinking a cellulosic substrate using magnesium hydroxide Nov. 27, 2012
8313616 Used paper recycling apparatus and its constituent devices Nov. 20, 2012
8287690 Modified inorganic particles for deinking Oct. 16, 2012
8262849 Apparatus and method for manufacturing fibre mass suspension Sep. 11, 2012
8177071 Injector for flotation cell May. 15, 2012
8167133 Flotation cell May. 1, 2012
8157954 Method of recovering a base paper for gypsum board Apr. 17, 2012
8133350 Deinking a cellulosic substrate using magnesium silicate Mar. 13, 2012
8133351 Deinking a cellulosic substrate using magnesium hydroxide Mar. 13, 2012
8118171 Process and device for aerating suspensions Feb. 21, 2012
8088254 Methods for producing recycled pulp, methods for modifying pulp fiber surfaces and dirts, as well as pulp processing equipments Jan. 3, 2012
8052837 Deinking of waste paper Nov. 8, 2011
8043473 Method of deinking recovered paper Oct. 25, 2011
7897010 Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles Mar. 1, 2011
7862685 Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles Jan. 4, 2011
7767057 Deinking blends for use in reduced alkali systems Aug. 3, 2010
7758719 Wet pulping system and method for producing cellulosic insulation with low ash content Jul. 20, 2010
7727355 Methods for producing recycled pulp and methods for modifying pulp fiber surfaces using liquid jet cavitation Jun. 1, 2010
7618517 Method and apparatus for monitoring liquid and solid contents in a froth Nov. 17, 2009
7544271 Open flotation de-inking module for recycled paper Jun. 9, 2009
7537674 Closed floatation de-inking module for recycled paper May. 26, 2009
7534322 Method of deinking recycled paper employing centrifigal cleaners May. 19, 2009
7390378 Method of curling fiber and absorbent sheet containing same Jun. 24, 2008
7381305 Method and apparatus for monitoring liquid and solid contents in a froth Jun. 3, 2008
7377993 Methods for reducing fluorescence in pulp and paper May. 27, 2008
7364642 Recycling of latex-containing broke Apr. 29, 2008
7318880 Method for defibring recycled fiber material in a drum pulper, and a drum pulper Jan. 15, 2008
7306697 Used paper diaper processing method and used paper diaper processing device Dec. 11, 2007
7300539 Treatment of solid containing material derived from effluent Nov. 27, 2007
7296682 Process for controlling operation of a flotation cell Nov. 20, 2007
7297224 Method of deinking waste paper using cellulase without lowering paper strength and method of evaluating the same Nov. 20, 2007
7294226 Method of removing high density stickies from secondary papermaking fibers Nov. 13, 2007
7291247 Absorbent sheet made with papermaking fibers with durable curl Nov. 6, 2007
7282114 Method for processing pulp Oct. 16, 2007
7281631 Process for de-inking paper pulp and flotation cell used for this process Oct. 16, 2007
7279073 Apparatus for liquid-based fiber separation Oct. 9, 2007
7267231 Process and device for aerating suspensions Sep. 11, 2007
7169257 Method of deinking waste paper using a reduced alkali system Jan. 30, 2007
7169263 Coarse dirt collector for removing coarse material from a pulper and corresponding method Jan. 30, 2007
7163604 Production of fiber suspension from waste paper Jan. 16, 2007
7138363 Use of metal complex compounds as oxidation catalysts Nov. 21, 2006
7138263 Endoglucanase enzyme NCE5 and cellulase preparations containing the same Nov. 21, 2006
7074299 Process for using a phloroglucinol color delta to control blending, deinking and bleaching of groundwood-containing secondary pulp Jul. 11, 2006
7063770 Method of removing high density stickies from secondary papermaking fibers Jun. 20, 2006
6920983 Device for separating solids from liquids by means of flotation Jul. 26, 2005

1 2 3 4 5 6 7 8










 
 
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