Patents by Inventor Christopher E. Wittner
Christopher E. Wittner 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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Publication number: 20240084052Abstract: Methods for making titanated silica supports, titanated chromium/silica pre-catalysts, and activated titanated chromium/silica catalysts are disclosed in which hydrogen peroxide and an alkali metal precursor are used during catalyst preparation. Resulting titanated chromium/silica pre-catalysts often contain silica, 0.1 to 5 wt. % chromium, 0.1 to 10 wt. % titanium, and less than or equal to 4 wt. % carbon, and further contain a bound alkali metal or zinc at a molar ratio of alkali metal:titanium or zinc:titanium from 0.02:1 to 3:1 and/or at an amount in a range from 0.01 to 2 mmol of alkali metal or zinc per gram of the silica. High melt index potential activated titanated chromium/silica catalysts can be used to polymerize olefins to produce, for example, ethylene based homopolymers and copolymers having HLMI values of greater than 30 g/10 min.Type: ApplicationFiled: October 24, 2023Publication date: March 14, 2024Inventors: Anand Ramanathan, Max P. McDaniel, Jared Barr, Andrew T. Blagg, Christopher E. Wittner, Alan L. Solenberger, Zachary T. Kilpatrick, Micheal P. Stevens
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Publication number: 20230340166Abstract: Methods for making titanated silica supports, titanated chromium/silica pre-catalysts, and activated titanated chromium/silica catalysts are disclosed in which hydrogen peroxide and an alkali metal precursor are used during catalyst preparation. Resulting titanated chromium/silica pre-catalysts often contain silica, 0.1 to 5 wt. % chromium, 0.1 to 10 wt. % titanium, and less than or equal to 4 wt. % carbon, and further contain an alkali metal or zinc at a molar ratio of alkali metal:titanium or zinc:titanium from 0.02:1 to 3:1 and/or at an amount in a range from 0.01 to 2 mmol of alkali metal or zinc per gram of the silica. High melt index potential activated titanated chromium/silica catalysts can be used to polymerize olefins to produce, for example, ethylene based homopolymers and copolymers having HLMI values of greater than 30 g/10 min.Type: ApplicationFiled: April 25, 2023Publication date: October 26, 2023Inventors: Anand Ramanathan, Max P. McDaniel, Jared Barr, Andrew Blagg, Christopher E. Wittner, Alan L. Solenberger, Zachary T. Kilpatrick, Micheal P. Stevens
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Publication number: 20220267579Abstract: Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm3, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of ?E/3? at an extensional rate of 0.03 sec?1 in a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture.Type: ApplicationFiled: April 29, 2022Publication date: August 25, 2022Inventors: Errun Ding, Chung Ching Tso, Max P. McDaniel, Ashish M. Sukhadia, Youlu Yu, Randall S. Muninger, Aaron M. Osborn, Christopher E. Wittner
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Patent number: 11339279Abstract: Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm3, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of ?E/3? at an extensional rate of 0.03 sec?1 in a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture.Type: GrantFiled: April 1, 2020Date of Patent: May 24, 2022Assignee: Chevron Phillips Chemical Company LPInventors: Errun Ding, Chung Ching Tso, Max P. McDaniel, Ashish M. Sukhadia, Youlu Yu, Randall S. Muninger, Aaron M. Osborn, Christopher E. Wittner
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Publication number: 20210309841Abstract: Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm3, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of ?E/3? at an extensional rate of 0.03 sec?1 in a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture.Type: ApplicationFiled: April 1, 2020Publication date: October 7, 2021Inventors: Errun Ding, Chung Ching Tso, Max P. McDaniel, Ashish M. Sukhadia, Youlu Yu, Randall S. Muninger, Aaron M. Osborn, Christopher E. Wittner
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Patent number: 9040643Abstract: The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.Type: GrantFiled: December 18, 2013Date of Patent: May 26, 2015Assignee: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Patent number: 9040642Abstract: The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers.Type: GrantFiled: November 4, 2013Date of Patent: May 26, 2015Assignee: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Publication number: 20140107301Abstract: The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.Type: ApplicationFiled: December 18, 2013Publication date: April 17, 2014Applicant: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Publication number: 20140057777Abstract: The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers.Type: ApplicationFiled: November 4, 2013Publication date: February 27, 2014Applicant: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Patent number: 8637616Abstract: The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.Type: GrantFiled: October 7, 2010Date of Patent: January 28, 2014Assignee: Chevron Philips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Patent number: 8609793Abstract: The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers.Type: GrantFiled: April 2, 2012Date of Patent: December 17, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Patent number: 8492498Abstract: A polymer having a density of from about 0.94 g/cm3 to about 0.96 g/cm3 and a primary structure parameter 2 (PSP2 value) of greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of equal to or greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A. A polymer having at least one lower molecular weight component and at least one higher molecular weight component and having a PSP2 value of equal to or greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A.Type: GrantFiled: February 21, 2011Date of Patent: July 23, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Albert P. Masino, Qing Yang, Paul J. DesLauriers, Steven J. Secora, Elizabeth M. Lanier, Guylaine St. Jean, Jon D. Ratzlaff, Christopher E. Wittner
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Publication number: 20120232229Abstract: The present invention provides polymerization processes utilizing a catalyst system containing an ansa-metallocene and a second metallocene compound for the production of olefin polymers.Type: ApplicationFiled: April 2, 2012Publication date: September 13, 2012Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Publication number: 20120214954Abstract: A polymer having a density of from about 0.94 g/cm3 to about 0.96 g/cm3 and a primary structure parameter 2 (PSP2 value) of greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of equal to or greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A. A polymer having at least one lower molecular weight component and at least one higher molecular weight component and having a PSP2 value of equal to or greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A.Type: ApplicationFiled: February 21, 2011Publication date: August 23, 2012Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Richard M. BUCK, Albert P. MASINO, Qing YANG, Paul J. DESLAURIERS, Steven J. SECORA, Elizabeth M. LANIER, Guylaine ST. JEAN, Jon D. RATZLAFF, Christopher E. WITTNER
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Publication number: 20120088890Abstract: The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.Type: ApplicationFiled: October 7, 2010Publication date: April 12, 2012Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Publication number: 20100280199Abstract: This invention provides a compositions that are useful for polymerizing at least one monomer into at least one polymer.Type: ApplicationFiled: June 14, 2010Publication date: November 4, 2010Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: MAX P. MCDANIEL, ELIZABETH A. BENHAM, SHIRLEY J. MARTIN, KATHY S. COLLINS, JAMES L. SMITH, GIL R. HAWLEY, CHRISTOPHER E. WITTNER, MICHAEL D. JENSEN
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Patent number: 7763561Abstract: This invention provides a compositions that are useful for polymerizing at least one monomer into at least one polymer.Type: GrantFiled: October 30, 2007Date of Patent: July 27, 2010Assignee: Chevron Phillips Chemical Company LPInventors: Max P. McDaniel, Elizabeth A. Benham, Shirley J. Martin, Kathy S. Collins, James L. Smith, Gil R. Hawley, Christopher E. Wittner, Michael D. Jensen
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Patent number: 7601665Abstract: This invention provides a compositions that are useful for polymerizing at least one monomer into at least one polymer.Type: GrantFiled: November 22, 2004Date of Patent: October 13, 2009Assignee: Chevron Phillips Chemical Company, LPInventors: Max P. McDaniel, Elizabeth A. Benham, Shirley J. Martin, Kathy S. Collins, James L. Smith, Gil R. Hawley, Christopher E. Wittner, Michael D. Jensen
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Patent number: 7547754Abstract: This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and a treated solid oxide compound.Type: GrantFiled: April 6, 2007Date of Patent: June 16, 2009Assignee: Chevron Phillips Chemical Company, LPInventors: Max P. McDaniel, Kathy S. Collins, Gil R. Hawley, Michael D. Jensen, Christopher E. Wittner, Elizabeth A. Benham, Anthony P. Eaton, Joel L. Martin, David C. Rohlfing, Youlu Yu
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Patent number: 7417097Abstract: This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and a treated solid oxide compound.Type: GrantFiled: December 21, 2004Date of Patent: August 26, 2008Assignee: Phillips Petroleum CompanyInventors: Youlu Yu, Max P. McDaniel, Kathy S. Collins, Gil R. Hawley, Michael D. Jensen, Christopher E. Wittner, Elizabeth A. Benham, Anthony P. Eaton, Joel L. Martin, David C. Rohlfing