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Class Information
Number: 528/359
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 compound having -c-c(=o)-o-c- group as part of a heterocyclic ring, e.g., lactone, etc. > Heterocyclic ring compound is a four-membered ring containing one oxygen and three carbon atoms -c-c(=o)-o-c-

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8658758 Process for producing aliphatic polyester reduced in residual cyclic ester content Feb. 25, 2014
8440215 Absorbable polymer formulations May. 14, 2013
8436133 Group 3 post-metallocene complexes based on bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands for the ring-opening polymerisation of polar cyclic monomers May. 7, 2013
8420745 Thermally curable solder resist composition Apr. 16, 2013
8362159 Degradable biocompatible block copolymer Jan. 29, 2013
8337991 Moldings comprising a polylactic acid composition Dec. 25, 2012
8252885 Process to make poly(trimethylene carbonate) glycol Aug. 28, 2012
8241545 Method of making polylactic acid and its products Aug. 14, 2012
8198392 Polymer producing method and apparatus and polymer degassing method and apparatus Jun. 12, 2012
8153754 Equipment and method for producing polyhydroxycarboxylic acid Apr. 10, 2012
8106150 Polylactide manufacturing apparatus and method for manufacturing polylactide Jan. 31, 2012
8076378 Dispersants Dec. 13, 2011
7997006 Laundry machine and control method thereof Aug. 16, 2011
7842261 Process for preparing resorbable polyesters by bulk polymerization Nov. 30, 2010
7754233 Method of preventing post-operative surgical adhesion Jul. 13, 2010
7671140 Ring-opening polymerization of cyclic esters, polyesters formed thereby, and articles comprising the polyesters Mar. 2, 2010
7622547 Process and activated carbon catalyst for ring-opening polymerization of lactone compounds Nov. 24, 2009
7399821 Alkylated poly(allylamine) polymers and methods of use Jul. 15, 2008
7175917 Biaxially oriented polylactic acid-based resin films Feb. 13, 2007
7151142 Biodegradable aliphatic polyester grafted with poly(ethylene glycol) having reactive groups and preparation method thereof Dec. 19, 2006
7148315 Monomer addition techniques to control manufacturing of bioabsorbable copolymers Dec. 12, 2006
7144976 Coumarin endcapped absorbable polymers Dec. 5, 2006
7141643 Alkylene oxide-lactone copolymers Nov. 28, 2006
7141302 Suture material for surgery, processes for its production and the use thereof Nov. 28, 2006
7129319 Amorphous polymeric polyaxial initiators and compliant crystalline copolymers therefrom Oct. 31, 2006
7119163 Process for continuously producing .epsilon.-caprolactone polymer Oct. 10, 2006
7105629 Coumarin endcapped absorbable polymers Sep. 12, 2006
7101960 Process for removing bile salts from a patient and alkylated compositions therefor Sep. 5, 2006
7094864 Process of continuously producing polyester polymer Aug. 22, 2006
7087247 Polyesters, method for producing same, and depot medicaments produced from these polyesters Aug. 8, 2006
7074883 Acid end group poly(D,L-lactide-co-glycolide) copolymers with high glycolide content Jul. 11, 2006
7071288 Terpolymers from lactide Jul. 4, 2006
7070858 Amorphous polymeric polyaxial initiators and compliant crystalline copolymers therefrom Jul. 4, 2006
7026437 Amorphous polymeric polyaxial initiators and compliant crystalline copolymers therefrom Apr. 11, 2006
7019106 Lactic acid polymer and process for producing the same Mar. 28, 2006
7012126 Coumarin endcapped absorbable polymers Mar. 14, 2006
6913826 Biodegradable polyester polymer and method for preparing the same using compressed gas Jul. 5, 2005
6911522 Filled epsilon-caprolactone based polymer compositions, method for preparing same and articles based on said compositions Jun. 28, 2005
6906147 Catalytic systems Jun. 14, 2005
6831149 Polymerization process using mono-and di-functional initiators to prepare fast crystallizing polylactone copolymers Dec. 14, 2004
6825314 Process for the preparation of cyclic lactic acid oligomers Nov. 30, 2004
6803443 Impact modifier and polyester composition containing the modifier Oct. 12, 2004
6800672 Biodegradable compositions comprising poly(cycloaliphatic phosphoester) compounds, articles, and methods for using the same Oct. 5, 2004
6794484 Crystallizable polylactone copolymers prepared from mono- and di-functional polymerization initiators Sep. 21, 2004
6794485 Amorphous polymeric polyaxial initiators and compliant crystalline copolymers therefrom Sep. 21, 2004
6770725 Bioactive surface modifiers for polymers and articles made therefrom Aug. 3, 2004
6767987 Lowly lactone-modified reactive monomer composition, acrylic polyol resins produced with the same, curable resin compositions and coating compositions Jul. 27, 2004
6756472 Process for producing polymer Jun. 29, 2004
6747121 Poly(L-lactide-co-glycolide) copolymers, methods for making and using same, and devices containing same Jun. 8, 2004
6740731 Degradation control of environmentally degradable disposable materials May. 25, 2004

1 2 3

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