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Class Information
Number: 162/DIG.9
Name: Paper making and fiber liberation > Uses for paper making sludge

Sub-classes under this class:

Class Number Class Name Patents
162/DIG.10 Computer control of paper making variables 114

Patents under this class:

Patent Number Title Of Patent Date Issued
7887629 Process for the preparation of paper, paperboard and cardboard Feb. 15, 2011
7300539 Treatment of solid containing material derived from effluent Nov. 27, 2007
7261869 Processes for preparing calcium carbonate Aug. 28, 2007
6758996 Cellulose-reinforced thermoplastic composite and methods of making same Jul. 6, 2004
6540871 Method for processing black liquor sediment Apr. 1, 2003
6444092 Process of recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard Sep. 3, 2002
6413591 Method of coating cellulosic and lignocellulosic webs Jul. 2, 2002
6214166 Process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard Apr. 10, 2001
6207015 Process for recovering raw materials from paper industry mechanical waste sludge Mar. 27, 2001
6174410 Process apparatus for recovering raw materials from paper mill effluents Jan. 16, 2001
6146498 Wound product cores and processes for making them Nov. 14, 2000
6063237 Treatment of solid containing material derived from effluent or waste from wastepaper treating process May. 16, 2000
5976318 Method for burning secondary sludge in a recovery boiler Nov. 2, 1999
5897700 Apparatus and integrated process for reclaiming paper mill sludge and producing useful products therefrom Apr. 27, 1999
5772847 Method for forming pulp from processed recycled fibers Jun. 30, 1998
5626717 Oxidative treatment of bleach plant effluent May. 6, 1997
5582682 Process and a composition for making cellulosic composites Dec. 10, 1996
5536371 Papermaking sludge recovery process and apparatus Jul. 16, 1996
5527432 Method of dry separating fibers from paper making waste sludge and fiber product thereof Jun. 18, 1996
5505774 Continuous flow process for treating waste cellulosic fiber and paper mill sludge Apr. 9, 1996
5496441 Utilization of deinking by-product in building materials Mar. 5, 1996
5478441 Recovery and re-use of raw materials from paper mill waste sludge Dec. 26, 1995
5474655 Process for controlling the deposition of stickies from paper stock suspensions Dec. 12, 1995
5423993 Fiber recovery system and process Jun. 13, 1995
5393436 Method of water treatment using polyacrylamide-phosphonate flocculants Feb. 28, 1995
5358607 Porous low density shot-like degradable absorbent materials and manufacturing process therefor Oct. 25, 1994
5332474 Conversion of pulp and paper mill waste solids to a papermaking filler product Jul. 26, 1994
5300147 Low brightness magnesium silicate SLR filler, low-brightness paper containing the filler and methods to produce the filler and use it in low brightness papers Apr. 5, 1994
5215625 Method for producing articles from waste fiber, waste/surplus paint, and waste/surplus ink Jun. 1, 1993
5137599 Conversion of pulp and paper mill sludge to papermaking pulp Aug. 11, 1992
4983258 Conversion of pulp and paper mill waste solids to papermaking pulp Jan. 8, 1991
4931139 Degradable absorbent material and manufacturing process therefor Jun. 5, 1990
4772504 Press felt Sep. 20, 1988
4734393 Non-clay oil and grease absorbent Mar. 29, 1988
4560527 Method of making agglomerated cellulosic particles using a substantially horizontal rotating drum Dec. 24, 1985
4497688 Oil scavenging material Feb. 5, 1985
4481072 Method for recovery of wastewater residues Nov. 6, 1984
4356060 Insulating and filler material comprising cellulose fibers and clay, and method of making same from paper-making waste Oct. 26, 1982
4311554 Incombustible material Jan. 19, 1982
4303019 Articles molded from papermill sludge Dec. 1, 1981
4191549 Solar chemical process for sludge treatment Mar. 4, 1980
4190492 Method of producing acoustical fiberboard Feb. 26, 1980
4159224 Method for the production of a fiber composite Jun. 26, 1979
4030968 Disposal of paper pulp mill sludge Jun. 21, 1977

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