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Class Information
Number: 521/49
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 > Treating polyurethane, polyurea (excluding urea-formaldehyde polymers), polyisocyanurate or polycarbodiimide
Description: Subject matter wherein the scrap or waste product contains either a polyurethane, polyurea, polylsocyanurate, or a polycarbodimide.










Sub-classes under this class:

Class Number Class Name Patents
521/49.5 Treating with alcohol or amine 89


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8669297 Textile backing formed from recycled materials Mar. 11, 2014
8653151 Articles prepared using recycled materials and methods of preparation thereof Feb. 18, 2014
8655633 Method of predicting the physical properties of polyurethane materials Feb. 18, 2014
8614259 Process of recycling powder coat material and component made thereof Dec. 24, 2013
8609740 Closed-loop recycled polyurethane foam, methods of manufacture and products therefrom Dec. 17, 2013
8557882 Method and device for the decontamination of plastic flakes Oct. 15, 2013
8487049 Recycling superabsorbent polymer fines Jul. 16, 2013
8466205 Methods and systems for recycling carpet and carpets manufactured from recycled material Jun. 18, 2013
8394866 Method and device for the decontamination of plastic flakes Mar. 12, 2013
8309618 Catalytic depolymerization of polymers containing electrophilic linkages using nucleophilic reagents Nov. 13, 2012
8304457 Plastic reprocessing with controlled decontamination Nov. 6, 2012
8202918 Method and system for processing waste materials Jun. 19, 2012
8188154 Decomposition reaction apparatus, system for producing raw material for recycled resin composition, method for producing raw material for recycled resin composition, raw material for recycled May. 29, 2012
8168688 Process of recycling paint sludge and component made thereof May. 1, 2012
8153699 Self-priming surfacing composition for finished surfaces Apr. 10, 2012
8106103 Method for processing and analyzing contaminated mixed waste plastics to produce reformulated, blended feed materials having a desired color Jan. 31, 2012
8097659 Flexible polyurethane foam and a method of producing the same Jan. 17, 2012
8071656 Nylon extraction from commingled materials Dec. 6, 2011
8030364 Polyols and polyurethanes, polyurethaneforms using the same Oct. 4, 2011
8017662 Method of separation and cleaning of post consumer carpet face yarn from carpet backing and yarn product produced therefrom Sep. 13, 2011
7943676 Method of recycling waste plastic foam materials May. 17, 2011
7902262 Method of recycling mixed streams of ewaste (WEEE) Mar. 8, 2011
7893120 Method for reclaiming pulverized synthetic resin product Feb. 22, 2011
7884140 Compositions of materials containing recycled plastics Feb. 8, 2011
7851514 Process for producing regenerated resin, regenerated resin, processing recovered matter from resin composition, regenerated resin composition and method of regenerating resin composition Dec. 14, 2010
7625953 Method and plant for the manufacture of polymer particles Dec. 1, 2009
7547734 Method for producing recycled resin, and resin material containing recycled resin produced by that method Jun. 16, 2009
7538143 Method for the treatment of waste containing polyamide with the reprocessing of the depolymerisation residue May. 26, 2009
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
7141647 Image file arrangement for use with an improved image quality assurance system Nov. 28, 2006
7138435 Method of decomposing thermosetting resin, apparatus and heat control program Nov. 21, 2006
7056956 Method for recycling a plastic material Jun. 6, 2006
7022751 Composite plastic materials produced from waste materials and method of producing same Apr. 4, 2006
6919383 CO2-assisted deploymerization, purification and recycling of step-growth polymers Jul. 19, 2005
6837950 Separation of floor covering components for recycling Jan. 4, 2005
6822009 Method for reclaiming waste cured resin Nov. 23, 2004
6802997 Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator Oct. 12, 2004
6750260 Process for chemical recycling of polyurethane-containing scrap Jun. 15, 2004
6723759 Recycled resin composition and method for producing the same Apr. 20, 2004
6683119 Method for producing polyols and polyols Jan. 27, 2004
6670404 Polymeric foam powder processing techniques, foam powders products, and foams produced containing those foam powders Dec. 30, 2003
6660779 Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator Dec. 9, 2003
6630517 Process for hydrolyzing and recycling a polyurethane Oct. 7, 2003
6515036 Method of decomposing a polyurethane Feb. 4, 2003
6489373 Method for decomposition and recovery of polyurethane resin Dec. 3, 2002
6384093 Method of melt processing crosslinked thermoplastic material May. 7, 2002
6306222 Process for cleaning plastics for recycling them Oct. 23, 2001
6245822 Method and apparatus for decomposition treating article having cured thermosetting resin Jun. 12, 2001
6172126 Cosolvent-free, aqueous, anionic polyurethane dispersions and their use as peelable coatings Jan. 9, 2001
6156811 Molded polyurethane articles prepared from recycled polyols and processes for their production and use Dec. 5, 2000

1 2 3










 
 
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