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Class Information
Number: 528/308.2
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 > Physically after-treated solid polymer
Description: Subject matter wherein the polymer claimed has been treated by physical means, such as stretching, heating, cutting, spinning, etc., in order to change the physical properties of the polymer.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8557882 Method and device for the decontamination of plastic flakes Oct. 15, 2013
8557950 High intrinsic viscosity melt phase polyester polymers with acceptable acetaldehyde generation rates Oct. 15, 2013
8470962 Method of thermoforming copolyesters Jun. 25, 2013
8404755 Polyester composition and method for preparing articles by extrusion blow molding Mar. 26, 2013
8404754 Recycling Mar. 26, 2013
8394866 Method and device for the decontamination of plastic flakes Mar. 12, 2013
8389667 Partially crystalline polyethyleneterephthalate Mar. 5, 2013
8362197 Resin particle and process for production thereof Jan. 29, 2013
8362198 Resin particle and process for production thereof Jan. 29, 2013
8324339 Method and apparatus for thermally processing polyester pellets Dec. 4, 2012
8309618 Catalytic depolymerization of polymers containing electrophilic linkages using nucleophilic reagents Nov. 13, 2012
8309681 Resin particle and method for producing the same Nov. 13, 2012
8299135 Vapor phase assisted post-consumer polymer processing apparatus and method Oct. 30, 2012
8236921 Integrated co-production of dicarboxylic acids Aug. 7, 2012
8138233 Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET) Mar. 20, 2012
8110609 Copolyetheresters derived from polyethylene terephthalate Feb. 7, 2012
8088885 Method and installation for increasing the intrinsic viscosity of polyester material by solid phase polycondensation Jan. 3, 2012
8088834 Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET) Jan. 3, 2012
8063176 Method and device for the crystallization of polyester material Nov. 22, 2011
8030364 Polyols and polyurethanes, polyurethaneforms using the same Oct. 4, 2011
7977448 Method for producing highly condensed solid-phase polyesters Jul. 12, 2011
7960472 Late addition to effect compositional modifications in condensation polymers Jun. 14, 2011
7935736 Method for recycling polyesters or polyester mixtures from polyester-containing waste May. 3, 2011
7902263 Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET) Mar. 8, 2011
7855238 Molding compositions containing polyalkylene terephthalates and modified polybutylene terephthalate (PBT) random copolymers derived from PET Dec. 21, 2010
7838596 Late addition to effect compositional modifications in condensation polymers Nov. 23, 2010
7819942 Solid-phase polycondensation of polyester with process gas purification Oct. 26, 2010
7799836 Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET) Sep. 21, 2010
7683156 Production of a high-molecular polycondensate Mar. 23, 2010
7638596 Crystallizer temperature control via jacketing/insulation Dec. 29, 2009
RE40571 Catalyst for polyester production, process for producing polyester using the catalyst, polyester obtained by the process, and uses of the polyester Nov. 11, 2008
7291694 Method and device for producing crystallizable plastic material Nov. 6, 2007
H2169 Method of manufacturing partially crystalline polyester articles Sep. 5, 2006
6855757 Preparation of glycol carboxyethylmethylphosphinate Feb. 15, 2005
6855435 Transparent, UV-stabilized film made from a crystallizable thermoplastic Feb. 15, 2005
6716959 Device and method for treating plastic material Apr. 6, 2004
6696146 Mono-or biaxially-stretched polyester resin foamed sheets and films Feb. 24, 2004
6511624 Process for preparing industrial polyester multifilament yarn Jan. 28, 2003
6369192 Methods for removing contaminants from polymers Apr. 9, 2002
6066713 Process for improving the drawing ability of polyester May. 23, 2000
6056901 Method for manufacture of regenerated synthetic resin product May. 2, 2000
6020453 Lactic acid excreting polylactide sheet for use in absorbent articles Feb. 1, 2000
5830981 Process for producing polyethylene terephthalate Nov. 3, 1998
5817747 Cooling process for polyester and/or polymide resins Oct. 6, 1998
5753736 Dimensionally stable fibers and non-woven webs May. 19, 1998
5714571 Process for the crystallization of polyester resins Feb. 3, 1998
5714262 Production of poly(ethylene terephthalate) Feb. 3, 1998
5708124 Process for the solid state polycondensation of polyester resins Jan. 13, 1998
5705601 Process for producing polyester film Jan. 6, 1998
5703134 Copolymers of recycled polyester Dec. 30, 1997

1 2 3 4

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