Patents by Inventor James Schreck

James Schreck 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).

  • Publication number: 20020111443
    Abstract: This invention relates to methods to introduce multiple catalysts, activators or catalyst systems into a gas phase reactor.
    Type: Application
    Filed: April 15, 2002
    Publication date: August 15, 2002
    Inventors: John F. Szul, Kersten Anne Erickson, Simon Mawson, David James Schreck, Mark G. Goode, Paul T. Daniell, Matthew G. McKee, Clark C. Williams
  • Publication number: 20020107341
    Abstract: This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.
    Type: Application
    Filed: October 10, 2001
    Publication date: August 8, 2002
    Inventors: Rex E. Murray, Simon Mawson, John F. Szul, Kersten Anne Erickson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Publication number: 20020103310
    Abstract: This invention relates to a process to polymerize olefin(s) comprising combining a solution, slurry or solid comprising one or more bulky ligand metallocene catalyst compounds, an optional support, and or one or more activator(s) with a solution comprising one or more phenoxide catalyst compounds, and thereafter, introducing one or more olefin(s) and the combination into a polymerization reactor. This invention also relates to a polymer of ethylene wherein the polymer has a density of 0.910 to 0.930 g/cc, a melt index of 0.3 to 2.0 dg/min, and a 15 to 35 &mgr;m thick film of the polymer has a 45° gloss of 60 or more, a haze of 7% or less, and a dart impact of 600 g or more.
    Type: Application
    Filed: December 4, 2000
    Publication date: August 1, 2002
    Inventors: John F. Szul, Tae Hoon Kwalk, David James Schreck, Simon Mawson, Matthew G. McKee, Kersten Anne Terry, Mark G. Goode, Gregory T. Whiteker, Eric A. Lucas
  • Publication number: 20020099152
    Abstract: The present invention relates to the use of thermally triggered compounds that when used with a polymerization catalyst in a polymerization process results in the controllable generation of one or more catalyst inhibitors that renders the polymerization catalyst substantially or completely inactive.
    Type: Application
    Filed: November 30, 2000
    Publication date: July 25, 2002
    Inventors: Timothy T. Wenzel, Dick Alan Nagaki, Thomas Henry Peterson, David James Schreck
  • Patent number: 6399722
    Abstract: This invention relates to methods to introduce multiple catalysts, activators or catalyst systems into a gas phase reactor.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: June 4, 2002
    Assignee: Univation Technologies, LLC
    Inventors: John F. Szul, Kersten Anne Erickson, Simon Mawson, David James Schreck, Mark G. Goode, Paul T. Daniell, Matthew G. McKee, Clark C. Williams
  • Publication number: 20020052453
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Application
    Filed: May 24, 2001
    Publication date: May 2, 2002
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Patent number: 6369174
    Abstract: The present invention relates to the use of at least one solid compound that when used with a polymerization catalyst in a polymerization process results in a phase change of the solid compound to a liquid that renders the polymerization catalyst substantially or completely inactive.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: April 9, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Timothy T. Wenzel, David James Schreck, Thomas H. Peterson
  • Patent number: 6346584
    Abstract: The present invention relates to the use of at least one acid and at least one base and/or at least one reductant and at least one oxidant that when used with a polymerization catalyst in a polymerization process results in the controllable generation of a catalyst inhibitor that renders the polymerization catalyst substantially or completely inactive.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: February 12, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Timothy T. Wenzel, Dick A. Nagaki, Simon Mawson, David James Schreck, Thomas H. Peterson
  • Publication number: 20020013219
    Abstract: The present invention relates to the use of at least one acid and at least one base and/or at least one reductant and at least one oxidant that when used with a polymerization catalyst in a polymerization process results in the controllable generation of a catalyst inhibitor that renders the polymerization catalyst substantially or completely inactive.
    Type: Application
    Filed: August 17, 2001
    Publication date: January 31, 2002
    Inventors: Timothy T. Wenzel, Dick A. Nagaki, Simon Mawson, David James Schreck, Thomas H. Peterson
  • Patent number: 6340730
    Abstract: This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: January 22, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Rex E. Murray, Simon Mawson, John F. Szul, Kersten Anne Erickson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Publication number: 20020007096
    Abstract: This invention relates to processes for producing substituted or unsubstituted alkenols. The process subjects an alkadiene to reductive hydroformylation to selectively produce at least one substituted or unsubstituted alkenols. The process is particularly useful in producing pentenols from butadiene. This invention also relates in part to reaction mixtures containing one or more substituted or unsubstituted alkenols as principal reaction products.
    Type: Application
    Filed: April 15, 1997
    Publication date: January 17, 2002
    Inventors: DIANE LEE PACKETT, JOHN ROBERT BRIGGS, DAVID ROBERT BRYANT, AILENE GARDNER PHILLIPS, DAVID JAMES SCHRECK, ANIL SAKHARAM GURAM, KURT DAMAR OLSON, THOMAS CARL EISENSCHMID
  • Publication number: 20010044508
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 22, 2001
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Publication number: 20010034297
    Abstract: This invention relates to an olefin polymerization catalyst composition comprising the product of the combination of at least one activator and at least two different transition metal compounds each of which is represented by the formula:
    Type: Application
    Filed: April 26, 2001
    Publication date: October 25, 2001
    Inventors: Rex E. Murray, Simon Mawson, Clark C. Williams, D. James Schreck
  • Patent number: 6274684
    Abstract: Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention also discloses a new polyolefin, generally polyethylene, particularly a multimodal polymer and more specifically, a bimodal polymer, and its use in various end-use applications such as film, molding and pipe.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: August 14, 2001
    Assignee: Univation Technologies, LLC
    Inventors: Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J. Karol, David James Schreck
  • Patent number: 6268447
    Abstract: This invention relates to an olefin polymerization catalyst composition comprising the product of the combination of at least one activator and at least two different transition metal compounds each of which is represented by the formula: ((Z)XAt(YJ))qMQn  (I) where M is a metal selected from Group 3 to 13 or lanthanide and actinide series of the Periodic Table of Elements; Q is bonded to M and each Q is a monovalent, divalent or trivalent anion; X and Y are bonded to M; X and Y are independently C or a heteroatom, provided that at least one of X and Y is a heteroatom and Y is contained in a heterocyclic ring J, where J comprises from 2 to 50 non-hydrogen atoms; Z is bonded to X, where Z comprises 1 to 50 non-hydrogen atoms; t is 0 or 1; when t is 1, A is a bridging group joined to at least one of X, Y or J; q is 1 or 2; n is the oxidation state of M minus q if Q is a monovalent anion, n is (the oxidation state of M−q)/2, if Q is a bivalent anion or n is (the oxidation state of M−q)/3
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: July 31, 2001
    Assignee: Univation Technologies, L.L.C.
    Inventors: Rex E. Murray, Simon Mawson, Clark C. Williams, D. James Schreck
  • Patent number: 6187970
    Abstract: This invention relates in part to processes for producing one or more substituted or unsubstituted 1,6-hexanediols which comprise subjecting one or more substituted or unsubstituted penten-1-ols to reductive hydroformylation in the presence of a reductive hydroformylation catalyst, e.g., a metal-organophosphorus ligand complex catalyst, to produce said one or more substituted or unsubstituted 1,6-hexanediols. The substituted and unsubstituted 1,6-hexanediols produced by the processes of this invention can undergo further reaction(s) to afford desired derivatives thereof, e.g., epsilon caprolactone. This invention also relates in part to reaction mixtures containing one or more substituted or unsubstituted 1,6-hexanediols as principal product(s) of reaction.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: February 13, 2001
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: John Robert Briggs, Diane Lee Packett, David Robert Bryant, Ailene Gardner Phillips, David James Schreck, Anil Sakharam Guram, Kurt Damar Olson, Thomas Carl Eisenschmid, Eric Bruce Tjaden
  • Patent number: 6166154
    Abstract: The invention relates to a process for the polymerization of olifins in the presence of an activated catalyst composition comprising a single site catalyst precursor and an activating cocatalyst, which comprises contacting outside of a polymerization reactor a single site catalyst precursor with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with a weakly coordinating electron donor that does not substantially polymerize during either contacting.
    Type: Grant
    Filed: May 15, 1999
    Date of Patent: December 26, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: John Henry Oskam, Thomas Henry Peterson, David James Schreck, Purna Chand Sishta, Timothy Todd Wenzel, Gregory Todd Whiteker, Clark Curtis Williams
  • Patent number: 5912202
    Abstract: A method for preparing an activated catalyst composition comprising a single site catalyst precursor and an activating cocatalyst, which comprises contacting outside of a polymerization reactor a single site catalyst precursor with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with a weakly coordinating electron donor such as 1-hexene.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: June 15, 1999
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: John Henry Oskam, Thomas Henry Peterson, David James Schreck, Purna Chand Sishta, Timothy Todd Wenzel, Gregory Todd Whiteker, Clark Curtis Williams
  • Patent number: 5821389
    Abstract: This invention relates in part to processes for producing one or more substituted or unsubstituted hydroxyaldehydes, e.g., 6-hydroxyhexanals, which comprise subjecting one or more substituted or unsubstituted alkadienes, e.g., butadiene, to reductive hydroformylation in the presence of a reductive hydroformylation catalyst, e.g., a metal-organophosphorus ligand complex catalyst, and hydroformylation in the presence of a hydroformylation catalyst, e.g., a metal-organophosphorus ligand complex catalyst, to produce one or more substituted or unsubstituted hydroxyaldehydes. The substituted and unsubstituted hydroxyaldehydes produced by the processes of this invention can undergo further reaction(s) to afford desired derivatives thereof, e.g., epsilon caprolactone. This invention also relates in part to reaction mixtures containing one or more substituted or unsubstituted hydroxyaldehydes as principal product(s) of reaction.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: October 13, 1998
    Assignee: Union Carbide Chemicals & Technology Corporation
    Inventors: John Robert Briggs, Diane Lee Packett, David Robert Bryant, Ailene Gardner Phillips, David James Schreck, Kurt Damar Olson, Erik Bruce Tjaden, Anil Sakharam Guram, Thomas Carl Eisenschmid, Elaine Susan Brigham