Patents by Inventor Elisabeth Hauptman
Elisabeth Hauptman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6897275Abstract: Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition metal or a lanthanide metal, are polymerization catalysts for the (co)polymerization of olefins such as ethylene and ?-olefins, and the copolymerization of such olefins with polar group-containing olefins. These and other nickel complexes of neutral and monoanionic bidentate ligands copolymerize ethylene and polar comonomers, especially acrylates, at relatively high ethylene pressures and surprisingly high temperatures, and give good incorporation of the polar comonomers and good polymer productivity. These copolymers are often unique structures, which are described.Type: GrantFiled: May 31, 2001Date of Patent: May 24, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Lin Wang, Elisabeth Hauptman, Lynda Kaye Johnson, Elizabeth Forrester McCord, Ying Wang, Steven Dale Ittel
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Publication number: 20050043496Abstract: Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition metal or a lanthanide metal, are polymerization catalysts for the (co)polymerization of olefins such as ethylene and ?-olefins, and the copolymerization of such olefins with polar group-containing olefins. These and other nickel complexes of neutral and monoanionic bidentate ligands copolymerize ethylene and polar comonomers, especially acrylates, at relatively high ethylene pressures and surprisingly high temperatures, and give good incorporation of the polar comonomers and good polymer productivity. These copolymers are often unique structures, which are described.Type: ApplicationFiled: September 16, 2004Publication date: February 24, 2005Inventors: Lin Wang, Elisabeth Hauptman, Lynda Johnson, Elizabeth McCord, Stephan McLain, Ying Wang
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Patent number: 6613915Abstract: Selected olefins such as ethylene and &agr;-olefins are polymerized by nickel [II] complexes of certain monoanionic ligands. The polyolefins are useful in many applications such as molding resins, film, fibers and others. Also described are many novel nickel compounds and their precursors, as well a novel ligands.Type: GrantFiled: October 13, 1999Date of Patent: September 2, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Lynda Kaye Johnson, Alison Margaret Anne Bennett, Lin Wang, Anju Parthasarathy, Elisabeth Hauptman, Robert D. Simpson, Jerald Feldman, Edward Bryan Coughlin, Steven Dale Ittel
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Patent number: 6613923Abstract: The present invention is a process for the catalytic hydrogenation of ketones and aldehydes to alcohols at low temperatures and pressures using organometallic molybdenum and tungsten complexes and the catalyst used in the process. The reactants include a functional group which is selected from groups represented by the formulas R*(C═O)R′ and R*(C═O)H, wherein R* and R′ are selected from hydrogen or any alkyl or aryl group. The process includes reacting the organic compound in the presence of hydrogen and a catalyst to form a reaction mixture. The catalyst is prepared by reacting Ph3C+A− with a metal hydride. A− represents an anion and can be BF4−, PF6−, CF3SO3− or Bar′4−, wherein Ar′=3,5-bis(trifluoromethyl)phenyl.Type: GrantFiled: April 19, 2000Date of Patent: September 2, 2003Assignee: Brookhaven Science Associates, LLCInventors: R. Morris Bullock, Barbara F. M. Kimmich, Paul J. Fagan, Elisabeth Hauptman
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Patent number: 6566544Abstract: This invention is directed to novel catalysts the structure and activity of which can be controlled to produce a wide range of alpha olefin polymers and co-polymers, and preferably for the production of stereoblock poly alpha olefins comprising a wide range of preselected amorphous and crystalline segments for precise control of the physical properties thereof, principally elastomeric thermoplastic properties. More specifically, this invention is directed to novel catalysts and catalysts systems for producing stereoblock polypropylene comprising alternating isotactic and atactic diastereosequences, which result in a wide range of elastomeric properties. The amount and numbers of crystalline sections, the isotactic pentad content, the number and length of intermediate atactic chains and overall molecular weight are all controllable by the steric structure of the catalysts and the process conditions.Type: GrantFiled: July 7, 1998Date of Patent: May 20, 2003Assignee: The Board of Trustees of the Leland Stanford Jr. UniversityInventors: Robert M. Waymouth, Elisabeth Hauptman, Geoffrey W. Coates
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Patent number: 6541585Abstract: Polymers are produced using transition metal complexes that have sites capable of binding a Lewis acid in close proximity to the metal center.Type: GrantFiled: May 31, 2001Date of Patent: April 1, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Lynda Kaye Johnson, Alison Margaret Anne Bennett, Kerwin D. Dobbs, Alex Sergey Ionkin, Steven Dale Ittel, Ying Wang, Catherine E. Radzewich, Lin Wang, Elisabeth Hauptman
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Publication number: 20020037982Abstract: Polymers are produced using transition metal complexes that have sites capable of binding a Lewis acid in close proximity to the metal center.Type: ApplicationFiled: May 31, 2001Publication date: March 28, 2002Inventors: Lynda Kaye Johnson, Alison Margaret Anne Bennett, Kerwin D. Dobbs, Alex Sergey Ionkin, Steven Dale Ittel, Ying Wang, Catherine E. Radzewich, Lin Wang, Elisabeth Hauptman
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Publication number: 20020032289Abstract: Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition metal or a lanthanide metal, are polymerization catalysts for the (co)polymerization of olefins such as ethylene and &agr;-olefins, and the copolymerization of such olefins with polar group-containing olefins. These and other nickel complexes of neutral and monoanionic bidentate ligands copolymerize ethylene and polar comonomers, especially acrylates, at relatively high ethylene pressures and surprisingly high temperatures, and give good incorporation of the polar comonomers and good polymer productivity. These copolymers are often unique structures, which are described.Type: ApplicationFiled: May 31, 2001Publication date: March 14, 2002Inventors: Lin Wang, Elisabeth Hauptman, Lynda Kaye Johnson, Elizabeth Forrester McCord, Ying Wang, Steven Dale Ittel
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Patent number: 6174975Abstract: Selected olefins such as ethylene and &agr;-olefins are polymerized by nickel [II] complexes of certain monoanionic ligands. The polyolefins are useful in many applications such as molding resins, film, fibers and others. Also described are many novel nickel compounds and their precursors, as well a novel ligands.Type: GrantFiled: January 13, 1998Date of Patent: January 16, 2001Assignee: E.I. du Pont de Nemours and CompanyInventors: Lynda Kaye Johnson, Alison Margaret Anne Bennett, Lin Wang, Anju Parthasarathy, Elisabeth Hauptman, Robert D. Simpson, Jerald Feldman, Edward Bryan Coughlin, Steven Dale Ittel
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Patent number: 5969070Abstract: Novel elastomeric alpha olefin polymers of homogeneous composition formed from linear or branched chain C.sub.3 -C.sub.10 monomers such as propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene and mixtures thereof, comprising alternating isotactic and atactic disastereosequences in which all polymer fractions have similar molecular weight distributions, M.sub.W /M.sub.n, of less than 7, an isotactic Block Index greater than about 5, an isotactic pentad, mmmm, content of between 9 and 71%, an average molecular weight, Mw, from about 20,000 to about 1,350,000, a melting point of above 70.degree. C., and which polymers are elastomeric in exhibiting a positive power of recovery of elongation above 100%. Examples include thermoplastic elastomeric polypropylenes having melting points between 70-165.degree. C., which are highly regioregular and have low tensile set of below about 70.degree. at 300% elongation.Type: GrantFiled: December 20, 1996Date of Patent: October 19, 1999Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Robert M. Waymouth, Elisabeth Hauptman, Geoffrey W. Coates