Patents by Inventor William T. Haygood
William T. Haygood 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: 7297747Abstract: Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: October 27, 2004Date of Patent: November 20, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Hart, William T. Haygood, Terry J. Burkhardt, Robert T. Li
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Patent number: 7122498Abstract: Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: June 29, 2001Date of Patent: October 17, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Hart, William T. Haygood, Terry J. Burkhardt, Robert T. Li
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Patent number: 7081543Abstract: The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more particularly, the present invention describes Group IV metallocenes containing diarylsilyl bridged bis-cyclopentadienyl ligands prepared from contacting a diarylsilyldisulfonate with an organometallic indenyl reagent.Type: GrantFiled: July 13, 2005Date of Patent: July 25, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Francis C. Rix, Terry J. Burkhardt, Robert T. Li, William T. Haygood, Jr.
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Patent number: 6960676Abstract: The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more particularly, the present invention describes Group IV metallocenes containing diarylsilyl bridged bis-cyclopentadienyl ligands prepared from contacting a diarylsilyldisulfonate with an organometallic indenyl reagent.Type: GrantFiled: February 8, 2001Date of Patent: November 1, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Francis C. Rix, Terry J. Burkhardt, Robert T. Li, William T. Haygood, Jr.
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Patent number: 6903229Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein R3 are identical or different and are each a halogen atom, a C1-C10 alkyl group which may be halogenated, a C6-C10 aryl group which may be halogenated, a C2-C10 alkenyl group, a C7-C40-arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, a —NR?2, —SR?, —OR?, —OSiR?3 or —PR?2 radical, wherein R? is one of a halogen atom, a C1-C10 alkyl group, or a C6-C10 aryl group, and R9 and R11 are identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.Type: GrantFiled: January 31, 2002Date of Patent: June 7, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Jr., Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Patent number: 6894179Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: January 31, 2002Date of Patent: May 17, 2005Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Matthew C. Kuchta, Udo M. Stehling, Robert T. Li, William T. Haygood, Jr., Terry J. Burkhardt
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Patent number: 6888017Abstract: This invention relates to bridged indenyl metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The bridge may be represented by the formula: wherein: R17 to R24 are identical or different, and are one of a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C6-C10 aryloxy group, a C2-C10 alkenyl group, a C7-C40 arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, or a halogen atom, or together are a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or hydrocarbyl, tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; or two or more adjacent radicals R17 to R24, including R20 and R21, together with the atoms connecting them form one or more rings; and M2 is carbon, silicon, germanium or tin.Type: GrantFiled: January 31, 2002Date of Patent: May 3, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Matthew C. Kuchta, Udo M. Stehling, Robert T. Li, William T. Haygood, Jr., Terry J. Burkhardt
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Patent number: 6870016Abstract: Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: ? wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.Type: GrantFiled: June 29, 2001Date of Patent: March 22, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry J. Burkhardt, James R. Hart, William T. Haygood, Robert T. Li
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Patent number: 6825372Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein R9 and R11 are identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.Type: GrantFiled: January 31, 2002Date of Patent: November 30, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Publication number: 20030220190Abstract: The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more particularly, the present invention describes Group IV metallocenes containing diarylsilyl bridged bis-cyclopentadienyl ligands prepared from contacting a diarylsilyldisulfonate with an organometallic indenyl reagent.Type: ApplicationFiled: October 16, 2002Publication date: November 27, 2003Inventors: Francis C Rix, Terry J Burkhardt, Robert T Li, William T Haygood
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Publication number: 20030073568Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: April 17, 2003Inventors: Matthew C. Kuchta, Udo M. Stehling, Robert T. Li, William T. Haygood, Terry J. Burkhardt
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Publication number: 20030008767Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: February 5, 2002Publication date: January 9, 2003Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Publication number: 20020193242Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: December 19, 2002Inventors: Matthew C. Kuchta, Udo M. Stehling, Roberrt T. Li, William T. Haygood, Terry J. Burkhardt
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Patent number: 6492465Abstract: This invention relates to propylene impact copolymer compositions. In particular, these unique and improved compositions can be produced using conventional, commercial-scale processes.Type: GrantFiled: March 24, 2000Date of Patent: December 10, 2002Assignee: ExxonMobil Chemical Patents, Inc.Inventors: Terry John Burkhardt, Robert Tan Li, Aspy Keki Mehta, Udo M. Stehling, William T. Haygood, Jr., Francis C. Rix, Dawn C. Wiser
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Publication number: 20020165084Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: November 7, 2002Inventors: Terry John Burkhardt, William T. Haygood, Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Publication number: 20020161143Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: ApplicationFiled: January 31, 2002Publication date: October 31, 2002Inventors: Terry J. Burkhardt, Udo M. Stehling, James R. Hart, William T. Haygood, Robert T. Li, James C. Vizzini, Matthew C. Kuchta
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Patent number: 6472474Abstract: This invention relates to propylene impact copolymer compositions. In particular, these unique and improved compositions can be produced using conventional, commercial-scale processes.Type: GrantFiled: November 27, 2001Date of Patent: October 29, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, Robert Tan Li, Aspy Keki Mehta, Udo M. Stehling, William T. Haygood, Jr., Francis C. Rix, Dawn C. Wiser
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Publication number: 20020086947Abstract: This invention relates to propylene impact copolymer compositions. In particular, these unique and improved compositions can be produced using conventional, commercial-scale processes.Type: ApplicationFiled: November 27, 2001Publication date: July 4, 2002Inventors: Terry John Burkhardt, Robert Tan Li, Aspy Keki Mehta, Udo M. Stehling, William T. Haygood, Francis C. Rix, Dawn C. Wiser
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Patent number: 6414095Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization The metallocene compositions may be represented by the formula: wherein M1 is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten; R1 and R2 are identical or different, and are one of a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C6-C10 aryloxy group, a C2-C40 alkenyl group, a C7-C40 arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, an OH group or a halogen atom or a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; R3 are identical or different and are each a hydrogen atom, a halogen atom, a C1-C10 alkyl group which may be halogenaType: GrantFiled: July 19, 2000Date of Patent: July 2, 2002Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
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Patent number: 6399723Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization.Type: GrantFiled: July 19, 2000Date of Patent: June 4, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart