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Class Information
Number: 528/308.1
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > From carboxylic acid or derivative thereof > From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof > Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid > Polyethylene terephthalate per se

Sub-classes under this class:

Class Number Class Name Patents
528/308.2 Physically after-treated solid polymer 169
528/308.3 Processes of preparing 136

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8664351 Biaxially oriented polyester film for backsheet of solar batteries Mar. 4, 2014
8658285 Optically clear UV and hydrolysis resistant polyester film Feb. 25, 2014
8648166 Process for producing antimony-free PET polyester fiber excellent in no yellowish look Feb. 11, 2014
8642715 Polyester film and method for producing same, backsheet for solar cell, and solar cell module Feb. 4, 2014
8637764 Biaxially oriented polyester film for sealing back surface of photovoltaics Jan. 28, 2014
8623991 IPA/polyester copolymer fiber Jan. 7, 2014
8568841 Thermo-shrinkable polyester film Oct. 29, 2013
8563677 Non-precipitating alkali/alkaline earth metal and aluminum solutions made with diols having at least two primary hydroxyl groups Oct. 22, 2013
8557919 Polymeric films and method of making same Oct. 15, 2013
8557370 White film and backlight using same Oct. 15, 2013
8557950 High intrinsic viscosity melt phase polyester polymers with acceptable acetaldehyde generation rates Oct. 15, 2013
8546513 Catalytic polymerization of polymers containing electrophiic linkages using nucleophilic reagents Oct. 1, 2013
8546516 Transparent polyimide-polyester compositions, method of manufacture, and articles thereof Oct. 1, 2013
8541477 Methods of depolymerizing terephthalate polyesters Sep. 24, 2013
8530609 Process for removing metal species in the presence of hydrogen and a porous material and polyester polymer containing reduced amounts of metal species Sep. 10, 2013
8512833 Heat-shrinkable polyester film Aug. 20, 2013
8492504 Catalytic depolymerization of polymers containing electrophilic linkages using nucleophilic reagents Jul. 23, 2013
8481675 Chemical recycling of PLA by alcoholysis Jul. 9, 2013
8476400 Dendritic oxygen scavenging polymer Jul. 2, 2013
8476364 Polymer manufacturing process Jul. 2, 2013
8470962 Method of thermoforming copolyesters Jun. 25, 2013
8470250 Polyester production system employing horizontally elongated esterification vessel Jun. 25, 2013
8465842 Biaxial oriented polyester film and a process for preparing the same Jun. 18, 2013
8431677 Purification of a conventional polymer flow contaminated with PLA Apr. 30, 2013
8404755 Polyester composition and method for preparing articles by extrusion blow molding Mar. 26, 2013
8404754 Recycling Mar. 26, 2013
8389667 Partially crystalline polyethyleneterephthalate Mar. 5, 2013
8367796 Catalytic polymerization of polymers containing electrophilic linkages using nucleophilic reagents Feb. 5, 2013
8329828 Heat-shrinkable polyester film and process for producing the same Dec. 11, 2012
8324339 Method and apparatus for thermally processing polyester pellets Dec. 4, 2012
8309677 Reactor with optimized internal tray design Nov. 13, 2012
8309618 Catalytic depolymerization of polymers containing electrophilic linkages using nucleophilic reagents Nov. 13, 2012
8299135 Vapor phase assisted post-consumer polymer processing apparatus and method Oct. 30, 2012
8252888 Process for continuous preparation of high molecular weight polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acids with diols and/or mixtures there Aug. 28, 2012
8247522 Production of non-solid-stated polyester particles having solid-stated properties Aug. 21, 2012
8207289 High molecular weight polyester polymers with reduced acetaldehyde Jun. 26, 2012
8110609 Copolyetheresters derived from polyethylene terephthalate Feb. 7, 2012
8017717 Method of producing polyesters Sep. 13, 2011
8003751 Oxygen scavenging polymers Aug. 23, 2011
7960472 Late addition to effect compositional modifications in condensation polymers Jun. 14, 2011
7951980 Process and apparatus for the recovery of ethylene glycol in the production of polyethylene terephthalate May. 31, 2011
7943094 Polyester production system employing horizontally elongated esterification vessel May. 17, 2011
7935736 Method for recycling polyesters or polyester mixtures from polyester-containing waste May. 3, 2011
7892498 Polyester production system employing an unagitated esterification reactor Feb. 22, 2011
7879969 Crystallizer temperature control via fluid control Feb. 1, 2011
7872089 Multi-level tubular reactor with internal tray Jan. 18, 2011
7868126 Process for producing polyester, polyester produced using said process, and polyester molded product Jan. 11, 2011
7868129 Sloped tubular reactor with spaced sequential trays Jan. 11, 2011
7868130 Multi-level tubular reactor with vertically spaced segments Jan. 11, 2011
7863407 Integrated polyester production facility Jan. 4, 2011

1 2 3 4 5

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