Patents Represented by Attorney Paige Schmidt
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Patent number: 6576306Abstract: This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films.Type: GrantFiled: March 6, 2001Date of Patent: June 10, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Aspy K. Mehta, Michael C. Chen, James J. McAlpin, Anthony N. Speca, Kelly Tormaschy, Chon Y. Lin
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Patent number: 6576686Abstract: This invention relates generally to linear tetrablock copolymer compositions and their use in road marking applications. These tetrablock copolymers contain polystyrene, polyisoprene and polybutadiene components. Road marking compounds prepared from these copolymers further contain a hydrocarbon resin.Type: GrantFiled: June 27, 2000Date of Patent: June 10, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventors: Roger Robert Delmé, Jacques Bernard Lechat, Chantal Mathilde Martin
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Patent number: 6528589Abstract: A process for forming a compatibilized blend of general purpose rubbers (GPR) and a halogenated poly(isobutylene-co-4-methylstyrene) through solventless reactions utilizing a multifunctional agent containing a diene reactive group and a benzylic halo reactive group.Type: GrantFiled: August 9, 2001Date of Patent: March 4, 2003Assignee: ExxonMobil Chemical Patents, Inc.Inventor: Anthony Jay Dias
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Patent number: 6524988Abstract: This invention relates to metallocene catalyst compositions which are highly active for the polymerization of olefins, particularly prochiral &agr;-olefins. The catalyst compositions contain at least one metallocene, and least one activator and a support that has been fluorided using a fluoride containing compound.Type: GrantFiled: June 20, 2001Date of Patent: February 25, 2003Assignee: ExxonMobil Chemical Patents Inc.Inventor: Anthony N. Speca
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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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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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Patent number: 6444774Abstract: This invention relates generally to fibers and fabrics prepared using crystalline propylene polymer compositions comprising both propylene homopolymer and propylene copolymer. The propylene polymer compositions are prepared using at least one metallocene catalyst system in a polymerization process that involves the initial homopolymerization of propylene followed by the copolymerization of propylene with a small amount of comonomer. Fibers prepared with these propylene polymers are significantly more elastic and fabrics prepared with these polymers have a significantly broader bonding window which allows for more easy processing compared to fibers and fabrics prepared from known propylene polymers.Type: GrantFiled: September 29, 1998Date of Patent: September 3, 2002Assignee: ExxonMobil Chemical Patents, Inc.Inventors: G. Allan Stahl, Galen C. Richeson
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Patent number: 6440882Abstract: This invention relates generally to novel fibers and fabrics. Specifically, these fibers are prepared using propylene impact copolymer compositions. Fabrics, particularly nonwoven fabrics, formed from these fibers exhibit improved elongation properties.Type: GrantFiled: February 29, 2000Date of Patent: August 27, 2002Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Dina Marie Colucci, Chia Yung Cheng, William Michael Ferry, Don Allen Plank
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Patent number: 6433104Abstract: This invention relates to an improved resin hydrotreating process which maintains resin softening point and aromaticity as well as catalyst lifetime. The process is particularly useful for hydrotreating resins containing one or more halogen residues. Pressures are maintained at 2000 psi or less. Color is substantially reduced while softening point is not decreased by more than 8° C.Type: GrantFiled: June 13, 2000Date of Patent: August 13, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Anne Vera Macedo, Jerry Lee Haluska
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Patent number: 6413900Abstract: Stabilized alumoxane solutions are provided as well as a method for producing such solutions. The method generally involves the use of metallocene catalyst component(s) that when mixed with alumoxane solutions reduce the tendency for such solutions to form gels.Type: GrantFiled: November 20, 2000Date of Patent: July 2, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Agapios Kyriacos Agapiou, Patrick Brant
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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
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Patent number: 6391817Abstract: A method for controlling fouling in a prepolymerization reactor is disclosed and comprises combining a supported metallocene catalyst system, an alpha olefin monomer feed, and added hydrogen under suitable prepolymerization reaction conditions. This method is also useful for the control of agglomeration during a prepolymerization reaction.Type: GrantFiled: March 10, 1995Date of Patent: May 21, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventor: Jeffrey L. Brinen
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Patent number: 6383439Abstract: This invention relates to grafted ethylene-higher &agr;-olefin polymers and blends thereof. Preferred grafted ethylene-higher &agr;-olefin polymers are multimodal EPDM's having 5-40 weight % of a higher molecular weight, higher ethylene content, lower diene content fraction grafted with maleic anhydride. These polymers can then be used as modifiers for additional polymers such as polyamides, polyesters, and other EPDM's.Type: GrantFiled: May 24, 1999Date of Patent: May 7, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventor: Jean-Roch H. Schauder
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Patent number: 6384142Abstract: 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: May 7, 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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Patent number: 6380124Abstract: 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: April 30, 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
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Patent number: 6380122Abstract: 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: April 30, 2002Assignee: 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: 6380120Abstract: 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: April 30, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Terry John Burkhardt, William T. Haygood, Jr., Udo M. Stehling, James R. Hart, Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta
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Patent number: 6380334Abstract: 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: April 30, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Matthew C. Kuchta, Udo M. Stehling, Robert T. Li, William T. Haygood, Terry J. Burkhardt
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Patent number: 6380330Abstract: 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: April 30, 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