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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
8703833 Solid surface sheets containing post-consumer recycled materials and methods of making same Apr. 22, 2014
8680165 Thermoset composite material and structural component and method of making the same from engineered recycled rubber powder Mar. 25, 2014
8673989 Method of devulcanizing a cross-linked elastomeric material Mar. 18, 2014
8669297 Textile backing formed from recycled materials Mar. 11, 2014
8664284 Depolymerization of polymers Mar. 4, 2014
8653150 Method for decomposing thermoset resin and recovering decomposition product Feb. 18, 2014
8653151 Articles prepared using recycled materials and methods of preparation thereof Feb. 18, 2014
8623929 Method and equipment for conditioning low-metal plastic scrap Jan. 7, 2014
8614259 Process of recycling powder coat material and component made thereof Dec. 24, 2013
8614260 Cross-linked polyphosphonate composition for removal of metal ions from wastewater Dec. 24, 2013
8598256 Multifunctional biocomposite additive compositions and methods Dec. 3, 2013
8591140 Patching material using powder coating paint and method of using Nov. 26, 2013
8580124 Switchable hydrophilicity solvents and methods of use thereof Nov. 12, 2013
8580388 Composition suitable for stretch hood, method of producing the same, and articles made therefrom Nov. 12, 2013
8580917 Method of purifying block copolymers Nov. 12, 2013
8557882 Method and device for the decontamination of plastic flakes Oct. 15, 2013
8557881 Wood composite material and method for making same Oct. 15, 2013
8546455 Expanded polystyrene solubilization method Oct. 1, 2013
8541477 Methods of depolymerizing terephthalate polyesters Sep. 24, 2013
8536238 Process for preparing insulation sheets from unseparated mixtures of post-consumer plastic articles Sep. 17, 2013
8530531 Method for the recycling of polyvinyl butyral Sep. 10, 2013
8524789 Processing and use of waste latex materials Sep. 3, 2013
8492504 Catalytic depolymerization of polymers containing electrophilic linkages using nucleophilic reagents Jul. 23, 2013
8487049 Recycling superabsorbent polymer fines Jul. 16, 2013
8470245 Plastic reprocessing with controlled decontamination Jun. 25, 2013
8470897 Devulcanization of rubber and other elastomers Jun. 25, 2013
8466257 Process and apparatus for purifying solid salt compositions Jun. 18, 2013
8466205 Methods and systems for recycling carpet and carpets manufactured from recycled material Jun. 18, 2013
8465618 Recovery of high value rubber from tires Jun. 18, 2013
8450382 Compositions of material containing recycled plastics May. 28, 2013
8445552 Solid surface sheets containing post-consumer recycled materials and methods of making same May. 21, 2013
8436058 Methods for separation and conditioning of products containing super absorbent polymers May. 7, 2013
8426480 Plastic reclaimed from infectious medical waste and medical devices manufactured therefrom Apr. 23, 2013
8420702 Process for recycling articles based on a fiber reinforced polymer Apr. 16, 2013
8420703 Method for separating and removing foreign matters from polyester fiber waste Apr. 16, 2013
8415402 Separating devulcanized rubber Apr. 9, 2013
8410245 Enhancing the physical properties of semi-crystalline polymers via solid-state shear pulverization Apr. 2, 2013
8404753 Method for degrading water-soluble polymeric films Mar. 26, 2013
8404754 Recycling Mar. 26, 2013
8404755 Polyester composition and method for preparing articles by extrusion blow molding Mar. 26, 2013
8399529 Method of homogenization and, optionally, analysis for processing moist noble metal-containing recycling materials with an unknown noble metal content Mar. 19, 2013
8394866 Method and device for the decontamination of plastic flakes Mar. 12, 2013
8383764 Method of purifying block copolymers Feb. 26, 2013
8357726 Devulcanization of rubber and other elastomers Jan. 22, 2013
8349285 Method of reclaiming carbonaceous materials from scrap tires and products derived therefrom Jan. 8, 2013
8344035 Tire recycling method generating carbonous reside Jan. 1, 2013
8344036 Method of processing silicone wastes Jan. 1, 2013
8338563 Method for purifying a plastic solution Dec. 25, 2012
8334325 Rubber de-vulcanisation Dec. 18, 2012
8329768 Method and apparatus for capturing carbon contained in plastics Dec. 11, 2012

1 2 3 4 5 6 7

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