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Class Information
Number: 528/308.3
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 > Processes of preparing
Description: Subject matter wherein the process of polymerization involving the stated reactants is claimed.










Sub-classes under this class:

Class Number Class Name Patents
528/308.5 At least two claimed distinct temperature or pressure gradients 63
528/308.4 In presence of hydrocarbon, steam or water 22


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8623991 IPA/polyester copolymer fiber Jan. 7, 2014
8563677 Non-precipitating alkali/alkaline earth metal and aluminum solutions made with diols having at least two primary hydroxyl groups Oct. 22, 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
8470962 Method of thermoforming copolyesters Jun. 25, 2013
8470250 Polyester production system employing horizontally elongated esterification vessel Jun. 25, 2013
8404755 Polyester composition and method for preparing articles by extrusion blow molding Mar. 26, 2013
8399599 Method and apparatus for processing of plastic material Mar. 19, 2013
8389667 Partially crystalline polyethyleneterephthalate Mar. 5, 2013
8367796 Catalytic polymerization of polymers containing electrophilic linkages using nucleophilic reagents Feb. 5, 2013
8343715 Photochromic polyesters and methods of producing photochromic polyesters Jan. 1, 2013
8324339 Method and apparatus for thermally processing polyester pellets Dec. 4, 2012
8324338 Oligomer removing agent for polyester-based fiber material Dec. 4, 2012
8309677 Reactor with optimized internal tray design Nov. 13, 2012
8304518 Method for thermally treating polyester pellets to obtain a partial crystallization Nov. 6, 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
8192694 Polyester production system employing an unagitated esterification reactor Jun. 5, 2012
8143355 Polymer compound and method of synthesizing the same Mar. 27, 2012
8110149 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 Feb. 7, 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
8080191 Extrudable polyethylene terephthalate blend Dec. 20, 2011
8003751 Oxygen scavenging polymers Aug. 23, 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
7943094 Polyester production system employing horizontally elongated esterification vessel May. 17, 2011
7910170 Coating compositions for containers and methods of coating Mar. 22, 2011
7892498 Polyester production system employing an unagitated esterification reactor Feb. 22, 2011
7868126 Process for producing polyester, polyester produced using said process, and polyester molded product Jan. 11, 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
7799892 Method of making polybutylene terephthalate and compositions and articles comprising the same Sep. 21, 2010
7776995 Process for production of polyester particles, polyester particles, polyester resin particles, and process for production thereof Aug. 17, 2010
7763701 Composite solid phase polymerization catalyst Jul. 27, 2010
7732556 Process of producing polyesters Jun. 8, 2010
7705109 Block copolyetherester elastomer and preparation thereof Apr. 27, 2010
7683156 Production of a high-molecular polycondensate Mar. 23, 2010
7662907 All-aromatic polyester compound, its preparation, and composition containing the same Feb. 16, 2010
7635726 Method for producing polyester Dec. 22, 2009
7592413 Manufacture of aromatic polyester Sep. 22, 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
7271236 Preparation method of polyester resin Sep. 18, 2007
7241854 Thermoplastic polyurethanes Jul. 10, 2007
7176274 Saturated polyester for plastic containers with excellent heat resistance and gas impermeability and method for manufacturing the same Feb. 13, 2007
7153927 Process of continuously producing polyesters or copolyesters Dec. 26, 2006
7015267 Polyethylene terephthalate compositions Mar. 21, 2006
6905774 Biaxially-oriented polyester film for fabrication and method of producing the same Jun. 14, 2005
6716959 Device and method for treating plastic material Apr. 6, 2004
6710158 Methods for making polyester bottle resins having reduced frictional properties Mar. 23, 2004

1 2 3










 
 
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