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Class Information
Number: 521/40
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
Description: Subject matter under Class 520, ... involving (a) process of recovery or producing solid organic synthetic polymer from polymeric scrap or waste product, or (b) process of preparing solid organic synthetic polymer from polymeric scrap or waste product by degradation of the polymeric scrap or waste product to monomer or low molecular weight prepolymer of a physically unseparated (i.e, nonfractionated) mixture thereof which is then reacted with another chemical species to generate another solid synthetic organic polymer.










Sub-classes under this class:

Class Number Class Name Patents
521/40.5 Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only 248
521/47.5 Treating polysiloxane 19
521/48 Treating polyester 291
521/49 Treating polyurethane, polyurea (excluding urea-formaldehyde polymers), polyisocyanurate or polycarbodiimide 121
521/49.8 Treating polycarbonamide 50


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

Patent Number Title Of Patent Date Issued
7598297 Method of reclaiming multilayered film waste Oct. 6, 2009
7592416 Polystyrene processing apparatus and method Sep. 22, 2009
7550516 Method for extracting nylon from waste materials Jun. 23, 2009
7547734 Method for producing recycled resin, and resin material containing recycled resin produced by that method Jun. 16, 2009
7541387 Agglomerated material containing recycled silicon Jun. 2, 2009
7538143 Method for the treatment of waste containing polyamide with the reprocessing of the depolymerisation residue May. 26, 2009
7531579 Method of making and using sorbent and filtering material from secondary waste rubber May. 12, 2009
7511081 Recycled method for a wasted polymer which is mixed polyester polyamide and reclaimed materials thereof Mar. 31, 2009
7462648 Recycle system for used plastic, method of reclaiming used ABS resin and reclaimed ABS resin Dec. 9, 2008
7452918 Recycled plastic material, electronic apparatus having the recycled plastic material, method of manufacturing plastic part, method of manufacturing the recycled plastic material, and method of Nov. 18, 2008
7319113 Solvent-based recovery and recycle of polyamide material Jan. 15, 2008
7297720 Recyclable composite materials, articles of manufacture, and structures and methods of using composite materials Nov. 20, 2007
7214722 Process for recycling detergent pouches May. 8, 2007
7166690 Recycled method for a wasted polyester and reclaimed materials thereof Jan. 23, 2007
7152742 Separation process for carpets Dec. 26, 2006
7141647 Image file arrangement for use with an improved image quality assurance system Nov. 28, 2006
7135503 Method for reclaiming polyester or polyester mixtures Nov. 14, 2006
7115671 Process for recovering monomeric units of a nylon from whole carpet Oct. 3, 2006
7096556 Recycling method and recycling apparatus of part for image forming apparatus, and recycled part for image forming apparatus Aug. 29, 2006
7087671 Recycled plastic molded parts for photosensitive materials Aug. 8, 2006
7087655 Separation process for multi-component polymeric materials Aug. 8, 2006
7056956 Method for recycling a plastic material Jun. 6, 2006
7045555 Regenerated resin composition May. 16, 2006
7022751 Composite plastic materials produced from waste materials and method of producing same Apr. 4, 2006
6992116 Devulcanization of cured rubber Jan. 31, 2006
6984670 Recyclable composite materials articles of manufacture and structures and method of using composite materials Jan. 10, 2006
6966105 Process for reclaiming rubber-metal waste Nov. 22, 2005
6962628 Method of treating epoxy resin-cured product Nov. 8, 2005
6958127 Coated molded article, method of recycling the same and apparatus therefor Oct. 25, 2005
6956065 Method for devulcanizing rubber with an amine Oct. 18, 2005
6924319 DEVULCANIZATION PRODUCT CONSISTING OF SCRAP RUBBER, A DEVULCANIZATION COMPOUND, A METHOD FOR PRODUCING SAME, THE REUSE THEREOF IN FRESH MIXTURES AND THE USE THEREOF FOR PRODUCING INJECTION MOU Aug. 2, 2005
6919383 CO2-assisted deploymerization, purification and recycling of step-growth polymers Jul. 19, 2005
6903142 System for sorting and processing a plurality of types of solid waste products for recycling Jun. 7, 2005
6881762 Process for recycling powder coating waste Apr. 19, 2005
6867322 Ester-forming monomer Mar. 15, 2005
6864294 RECYCLED PLASTIC MATERIAL, ELECTRONIC APPARATUS HAVING THE RECYCLED PLASTIC MATERIAL, METHOD OF MANUFACTURING PLASTIC PART, METHOD OF MANUFACTURING THE RECYCLED PLASTIC MATERIAL, AND METHOD OF Mar. 8, 2005
6822009 Method for reclaiming waste cured resin Nov. 23, 2004
6812261 Rubber composition and goods Nov. 2, 2004
6794419 Method for recycling the resin mold Sep. 21, 2004
6793709 Delamination process Sep. 21, 2004
6766109 Camera casing and recycling method therefor Jul. 20, 2004
6761775 Rinsewater separable and recyclable anaerobic curing impregnation compositions Jul. 13, 2004
6750260 Process for chemical recycling of polyurethane-containing scrap Jun. 15, 2004
6734216 Plastic recycling May. 11, 2004
6730732 Rubber compositions containing ground curing bladder rubber May. 4, 2004
6670404 Polymeric foam powder processing techniques, foam powders products, and foams produced containing those foam powders Dec. 30, 2003
6599950 Process for the recovery and separation of plastics Jul. 29, 2003
6583211 Moldable composite material Jun. 24, 2003
6566412 Method and apparatus for reprocessing rubber tires May. 20, 2003
6559220 Water-dilutable stone impact protection paint and compensation paint, their use and process for their production May. 6, 2003

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