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James C. Stevens, Richmond US

James C. Stevens, Richmond, TX US

Patent application numberDescriptionPublished
20090312509POLYPROPYLENE SOLUTION POLYMERIZATION PROCESS - A process for polymerization of propylene, optionally ethylene, and further optionally one or more C12-17-2009
20100036069HIGH EFFICIENCY SOLUTION POLYMERIZATION PROCESS - A catalyst composition comprising a zirconium complex of a polyvalent aryloxyether and an alumoxane, polymerization processes employing the same, especially the continuous, solution polymerization of ethylene and one or more C02-11-2010
20100190943MULTI-BLOCK COPOLYMER PROCESS USING POLAR SOLVENTS - A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin monomers in the presence of a chain shuttling agent and a catalyst composition comprising two or more olefin polymerization catalysts capable of preparing polymers having differing chemical or physical properties under equivalent polymerization conditions, or a catalyst composition comprising at least one olefin polymerization catalyst containing multiple active catalyst sites capable of preparing polymers having differing chemical or physical properties07-29-2010
20100222516TACTIC POLYMER POLYMERIZATION PROCESS USING CHIRAL CATALYSTS - A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one asymmetrically substituted (chiral) carbon atom, and a chain shuttling agent, a polar aprotic organic compound, or both a chain shuttling agent and a polar aprotic organic compound.09-02-2010
20110100438BUILDING INTEGRATED PHOTOVOLTAIC HAVING INJECTION MOLDED COMPONENT - The invention is a photovoltaic device comprising a photovoltaic cell assembly with an injection molded portion connected to at least one edge of the photovoltaic cell assembly where the body portion has properties and a composition enabling robust function over a period of years when the photovoltaic device is mounted on the exterior of a building.05-05-2011
20110118416Catalyst Composition Comprising Shuttling Agent for Ethylene Multi-Block Copolymer Formation - A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: 05-19-2011
20110124818Catalyst Composition Comprising Shuttling Agent for Ethylene Multi-Block Copolymer Formation - A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: 05-26-2011
20110184135POLYMERIZATION MODIFIERS - A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and 1-octene and a polymerization process using the polymerization modifier.07-28-2011

Patent applications by James C. Stevens, Richmond, TX US