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Class Information
Number: 521/43.5
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Process of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom > Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only > Treating rubber (or rubberlike materials) or polymer derived from a monomer having at least two ethylenic unsaturated moieties > Treating with organic chalcogen-containing material > Containing carboxylic acid or anhydride group
Description: Subject matter wherein the organic chalcogen material is a carboxylic acid or the anhydride thereof.

Patents under this class:

Patent Number Title Of Patent Date Issued
8673989 Method of devulcanizing a cross-linked elastomeric material Mar. 18, 2014
8304460 Methods for making composites having thermoplastic properties from recycled crosslinked polymer Nov. 6, 2012
8153699 Self-priming surfacing composition for finished surfaces Apr. 10, 2012
7893120 Method for reclaiming pulverized synthetic resin product Feb. 22, 2011
7728047 Process for the recycling of expanded polystyrene Jun. 1, 2010
7619013 Reclaimed resin composition produced from pulverized waste plastic material containing solid foreign materials Nov. 17, 2009
7601760 Method of decomposing plastic Oct. 13, 2009
7547734 Method for producing recycled resin, and resin material containing recycled resin produced by that method Jun. 16, 2009
6815510 Elastomer reclaiming composition and method Nov. 9, 2004
6797757 Article, including tires, having component or rubber composition which contains particles of pre-vulcanized rubber and blend of tetrathiodipropionic and trithiodipropionic acids Sep. 28, 2004
6555588 Method for the production of a polypropylene blend Apr. 29, 2003
6541526 Method and composition for devulcanization of waste rubber Apr. 1, 2003
6387966 Method and composition for devulcanization of waste rubber May. 14, 2002
6346561 Pavement material Feb. 12, 2002
6310126 Mixer and process for use Oct. 30, 2001
6160031 Process for decomposing a polymer to its monomer or monomers Dec. 12, 2000
6114401 Plastic reclamation process Sep. 5, 2000
5910514 Synthetic mulch Jun. 8, 1999
5905095 Used tire process May. 18, 1999
5883139 Process for improving the properties of ground recycled rubber Mar. 16, 1999
5717050 Hypoallergenic natural rubber products from parthenium argentatum (gray) and other non-hevea brasiliensis species Feb. 10, 1998
5653867 Method for the separation of high impact polystyrene (HIPS) and acrylonitrile butadiene styrene (ABS) plastics Aug. 5, 1997
5651994 Elastic paving material Jul. 29, 1997
5639801 Processing of anhydride-containing thermoplastic resins Jun. 17, 1997
5618852 Used tire process Apr. 8, 1997
5604277 Rubber and plastic bonding Feb. 18, 1997
5580942 Hypoallergenic natural rubber products from parthenum argentatum (gray) and other non-hevea brasiliensis species Dec. 3, 1996
5556888 Rubber compounds containing vulcanized scrap rubber, methods of manufacturing such rubber compounds Sep. 17, 1996
5504122 Recovery of dimethyl terephthalate from polymer mixtures Apr. 2, 1996
5464877 Method for recovering a synthetic waste material contaminated with other materials Nov. 7, 1995
5420166 Glycolysis of cured unsaturated polyesters for producing a recycle reactant May. 30, 1995
5397825 Rubber recycling process and product Mar. 14, 1995
5356939 Process for making rubber articles and rubber articles made thereby Oct. 18, 1994
5336755 Process for the recovery of polymers dissolved in aqueous alkaline or acid media Aug. 9, 1994
5317043 Process for the recovery of polymers dissolvable in aqueous alkaline or acid media May. 31, 1994
5120768 Process for separating polyethylene terephthalate from polyvinyl chloride Jun. 9, 1992
5030662 Construction material obtained from recycled polyolefins containing other polymers Jul. 9, 1991
4244841 Method for recycling rubber and recycled rubber product Jan. 13, 1981
4097644 Inorganic raw felt intended for the production of roof felt Jun. 27, 1978
4046834 Treatment of vulcanized rubber Sep. 6, 1977
4018730 Method for emulsifying asphalt-rubber paving material and a stable thixotropic emulsion of said material Apr. 19, 1977

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