Patents by Inventor Timothy Daniel Shaffer
Timothy Daniel Shaffer 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: 8076524Abstract: The present invention relates to a method for preparing olefin comonomers from ethylene. The comonomer generated can be used in a subsequent process, such as a polyethylene polymerization reactor. The comonomer generated can be transported, optionally without isolation or storage, to a polyethylene polymerization reactor. One method includes the steps of: feeding ethylene and a catalyst in a solvent/diluent to one or more comonomer synthesis reactors; reacting the ethylene and the catalyst under reaction conditions sufficient to produce an effluent comprising a desired comonomer; forming a gas stream comprising unreacted ethylene, and a liquid/bottoms stream comprising the comonomer, optionally by passing the effluent to one or more downstream gas/liquid phase separators; and purifying at least a portion of said liquid/bottoms stream by removing at least one of solid polymer, catalyst, and undesirable olefins therefrom.Type: GrantFiled: January 17, 2007Date of Patent: December 13, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Lattner, John F. Walzer, Jr., Krishnan Sankaranarayanan, John Scott Buchanan, Milind Bholanath Ajinkya, Stephen M Wood, Anastasios I Skoulidas, Jay L Reimers, Timothy Daniel Shaffer
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Patent number: 7781547Abstract: The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.Type: GrantFiled: June 25, 2004Date of Patent: August 24, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Yuan-Ju (Ray) Chen, Michael Francis McDonald, Timothy Daniel Shaffer, David Yen-Lung Chung, Robert Norman Webb
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Patent number: 7723447Abstract: The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.Type: GrantFiled: December 19, 2003Date of Patent: May 25, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Scott Thomas Milner, Michael Gerard Matturro, Timothy Daniel Shaffer, Robert Norman Webb, David Yen-Lung Chung, Michael Francis McDonald
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Patent number: 7582715Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, substantially free of long chain branching.Type: GrantFiled: December 19, 2003Date of Patent: September 1, 2009Assignee: Exxonmobil Chemical Patents Inc.Inventors: Scott Thomas Milner, Timothy Daniel Shaffer, David Yen-Lung Chung
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Patent number: 7491773Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel halogenated polymers with new sequence distributions. In particular, the invention relates to halogenated copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.Type: GrantFiled: December 10, 2004Date of Patent: February 17, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, David Yen-Lung Chung
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Publication number: 20080290049Abstract: The invention relates to methods for separating slurry components. In particular, the invention relates to the concentration of polymer particles in a slurry from the polymerization of C4-C7 isoolefins.Type: ApplicationFiled: June 23, 2004Publication date: November 27, 2008Inventors: Timothy Daniel Shaffer, Scott Thomas Milner, David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb, Pamela Jean Wright
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Patent number: 7425601Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and an alkylstyrene, preferably methylstyrene, even more preferably para-methylstyrene, with new sequence distributions. The copolymer may optionally be halogenated.Type: GrantFiled: December 19, 2003Date of Patent: September 16, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: David Yen-Lung Chung, Timothy Daniel Shaffer
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Patent number: 7423100Abstract: The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.Type: GrantFiled: December 19, 2003Date of Patent: September 9, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael Francis McDonald, Scott Thomas Milner, Timothy Daniel Shaffer, Robert Norman Webb
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Patent number: 7414101Abstract: The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.Type: GrantFiled: May 22, 2007Date of Patent: August 19, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, Scott Thomas Milner, Michael Gerard Matturro, David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb
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Publication number: 20080103272Abstract: The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.Type: ApplicationFiled: June 25, 2004Publication date: May 1, 2008Inventors: Yuan-Ju ( Ray) Chen, Michael Francis McDonald, Timothy Daniel Shaffer, David Yen-Lung Chung, Robert Norman Webb
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Patent number: 7332554Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.Type: GrantFiled: December 19, 2003Date of Patent: February 19, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, David Yen-Lung Chung
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Patent number: 7332555Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.Type: GrantFiled: December 10, 2004Date of Patent: February 19, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, David Yen-Lung Chung
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Patent number: 7232872Abstract: The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.Type: GrantFiled: December 19, 2003Date of Patent: June 19, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy Daniel Shaffer, Scott Thomas Milner, Michael Gerard Matturro, David Yen-Lung Chung, Michael Francis McDonald, Robert Norman Webb
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Patent number: 7214750Abstract: The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons.Type: GrantFiled: December 19, 2003Date of Patent: May 8, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael Francis McDonald, Scott Thomas Milner, Timothy Daniel Shaffer, Robert Norman Webb
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Patent number: 7037989Abstract: Substantially random ethylene and/or ?-olefin copolymers containing units derived from vicinally disubstituted olefin monomers are described. The vicinally disubstituted olefin monomers may be represented by the generic formula (R1)CH?CH(R2), where R1 and R2 independently comprise hydrocarbyl or silyl-hydrocarbyl groups containing 1 or more carbon atoms, or may be linear, branched or cyclic substituted or unsubstituted hydrocarbyl groups having from 1-100 carbon atoms, or they may contain 30 or less carbon atoms. The copolymers may be prepared by coordination polymerization by means of contacting at least one vicinally disubstituted olefin monomer and ethylene and/or ?-olefin, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl heteroatom-containing Group 4 transition metal catalyst component.Type: GrantFiled: May 27, 2003Date of Patent: May 2, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Smita Kacker, Enock Berluche, Timothy Daniel Shaffer, Jo Ann Marie Canich
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Publication number: 20040242814Abstract: Substantially random ethylene and/or &agr;-olefin copolymers containing units derived from vicinally disubstituted olefin monomers are described. The vicinally disubstituted olefin monomers may be represented by the generic formula (R1)CH═CH(R2), where R1 and R2 independently comprise hydrocarbyl or silyl-hydrocarbyl groups containing 1 or more carbon atoms, or may be linear, branched or cyclic substituted or unsubstituted hydrocarbyl groups having from 1-100 carbon atoms, or they may contain 30 or less carbon atoms,. The copolymers may be prepared by coordination polymerization by means of contacting at least one vicinally disubstituted olefin monomer and ethylene and/or &agr;-olefin, optionally with one or more other coordination polymerizable monomers, with a catalyst system comprising a monocyclopentadienyl heteroatom-containing Group 4 transition metal catalyst component.Type: ApplicationFiled: May 27, 2003Publication date: December 2, 2004Inventors: Smita Kacker, Enock Berluche, Timothy Daniel Shaffer, Jo Ann Marie Canich
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Patent number: 6777584Abstract: A process for producing a linear &agr;-olefin which comprises: reacting a stoichiometric excess of a terminal Cn olefin with ethylene in the presence of an organometallic catalyst to produce a Cn+2 linear &agr;-olefin, wherein the catalyst is capable of producing a Schulz-Flory distribution of the linear &agr;-olefin with a Schulz-Flory constant of less than about 0.8 and wherein n is an integer between about 3 to 20.Type: GrantFiled: February 22, 2002Date of Patent: August 17, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Abhimanyu Onkar Patil, Stephen Zushma, Timothy Daniel Shaffer
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Patent number: 6699938Abstract: A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion is preferably used at a temperature of 20° C. or less to produce olefin polymers, particularly polymers and copolymers of isobutylene.Type: GrantFiled: July 5, 2001Date of Patent: March 2, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventor: Timothy Daniel Shaffer
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Publication number: 20030166985Abstract: A process for producing a linear &agr;-olefin which comprises: reacting a stoichiometric excess of a terminal Cn olefin with ethylene in the presence of an organometallic catalyst to produce a Cn+2 linear &agr;-olefin, wherein the catalyst is capable of producing a Schulz-Flory distribution of the linear &agr;-olefin with a Schulz-Flory constant of less than about 0.8 and wherein n is an integer between about 3 to 20.Type: ApplicationFiled: February 22, 2002Publication date: September 4, 2003Inventors: Abhimayu Onkar Patil, Stephen Zushma, Timothy Daniel Shaffer
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Patent number: 6492473Abstract: The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late transition metal catalyst systems, transition metal metallocene catalyst systems or Ziegler-Natta catalyst systems. Preferred embodiments include at least one late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure and at least one transition metal metallocene catalyst system comprising a Group 4 metal complex stabilized by at least one ancillary cyclopentadienyl ligand. The polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under polymerization conditions.Type: GrantFiled: August 8, 2000Date of Patent: December 10, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jo Ann Marie Canich, George Alan Vaughan, Phillip T. Matsunaga, David Edward Gindelberger, Timothy Daniel Shaffer, Kevin Richard Squire