Patents by Inventor William M. Whitte
William M. Whitte 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: 10184018Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: GrantFiled: December 15, 2016Date of Patent: January 22, 2019Assignee: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Publication number: 20170096512Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: ApplicationFiled: December 15, 2016Publication date: April 6, 2017Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Patent number: 9550849Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: GrantFiled: January 14, 2016Date of Patent: January 24, 2017Assignee: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Publication number: 20160122454Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: ApplicationFiled: January 14, 2016Publication date: May 5, 2016Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Patent number: 9273170Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: GrantFiled: March 12, 2014Date of Patent: March 1, 2016Assignee: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Publication number: 20150259455Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: ApplicationFiled: March 12, 2014Publication date: September 17, 2015Applicant: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Publication number: 20040059070Abstract: An olefin polymerization process and apparatus produce, in a single reactor, a polymer with a broad molecular weight distribution and short chain branching concentrated in the high molecular weight portion of the polymer product. A molecular weight lever, such as hydrogen, is pulsed out of phase with a short chain branching lever, such as 1-hexene, to produce a polymer product having desirable toughness characteristics and improved processability.Type: ApplicationFiled: May 20, 2003Publication date: March 25, 2004Inventors: William M. Whitte, Steven J. Secora, Rebecca L. Jones
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Patent number: 6355359Abstract: A self supporting film having one or more layers wherein at least one layer has a percent haze of less than 17.8 and the polymer of that layer consists essentially of a polyethylene having a density of at least 0.925 grams per cc, a molecular weight distribution of no more than 4, optionally containing a fluoroelastomer, and methods for making such film are disclosed.Type: GrantFiled: October 31, 2000Date of Patent: March 12, 2002Assignee: Phillips Petroleum CompanyInventors: Ashish M. Sukhadia, William R. Coutant, Jim D. Byers, Louis Moore, Jr., M. Bruce Welch, Syriac J. Palackal, Kiplin D. Cowan, David C. Rohlfing, Jay Janzen, Paul J. DesLauriers, William M. Whitte
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Patent number: 6248840Abstract: A process comprising reacting at least one polymer component, with at least one reactive component, to produce a composition, the polymer being a metallocene polymerized ethylene (co)polymer, and the reactive component being a crosslinking agent.Type: GrantFiled: December 28, 1998Date of Patent: June 19, 2001Assignee: Phillips Petroleum CompanyInventors: Ashish M. Sukhadia, M. Bruce Welch, William M. Whitte, Syriac J. Palackal, William R. Coutant
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Patent number: 6214469Abstract: A high clarity film containing three layers wherein the polymer of each outer layer is the same or different polyethylene selected from polyethylenes having a density of at least 0.925 g/cc, and a molecular weight distribution of less than 4, and being further characterized by being substantially free of branches having 6 or more carbon atoms, polyethylenes of the outer layers optionally containing a fluoroelastomer.Type: GrantFiled: January 15, 1998Date of Patent: April 10, 2001Assignee: Phillips Petroleum CompanyInventors: Ashish M. Sukhadia, David C. Rohlfing, Jay Janzen, Paul J. DesLauriers, Jim D. Byers, Louis Moore, Jr., M. Bruce Welch, Syriac J. Palackal, William M. Whitte, William R. Coutant, Kiplin D. Cowan
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Patent number: 5654249Abstract: Chromium catalyst compositions are provided. These chromium catalyst compositions comprise at least two chromium catalyst systems that have a certain amount of chromium and a support that comprises silica and titania. the supports have certain pore volumes and surface areas. These catalyst compositions are useful for homopolymerizing ethylene or copolymerizing ethylene with a comonomer. The resins produced are useful in film applications.Type: GrantFiled: May 25, 1995Date of Patent: August 5, 1997Assignee: Phillips Petroleum CompanyInventors: Kent W. Rollmann, Elizabeth A. Benham, William M. Whitte, Max P. McDaniel, William R. Coutant, F. Wallace Bailey
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Patent number: 5508362Abstract: Chromium catalyst compositions are provided. These chromium catalyst compositions comprise at least two chromium catalyst systems that have a certain amount of chromium and a support that comprises silica and titania. the supports have certain pore volumes and surface areas. These catalyst compositions are useful for homopolymerizing ethylene or copolymerizing ethylene with a comonomer. The resins produced are useful in film applications.Type: GrantFiled: October 8, 1993Date of Patent: April 16, 1996Assignee: Phillips Petroleum CompanyInventors: Kent W. Rollmann, Elizabeth A. Benham, William M. Whitte, Max P. McDaniel, William R. Coutant, F. Wallace Bailey
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Patent number: 4598128Abstract: An ethylene polymer composition is provided, the composition being a blend of a first ethylene polymer and a second ethylene polymer, the second ethylene polymer characterized by molecules having long chain Y-branches. The blend can be prepared by an extrusion process in which a portion of the polyethylene fed to the process is irradiated and the irradiated and non-irradiated polymers are blended by melt extrusion. The blends exhibit high flow activation energies and good blow-molding properties.Type: GrantFiled: March 14, 1983Date of Patent: July 1, 1986Assignee: Phillips Petroleum CompanyInventors: James C. Randall, William M. Whitte
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Patent number: 4547551Abstract: Ethylene polymer blends of a high molecular weight ethylene polymer, preferably an ethylene-mono-1-olefin copolymer, and a low molecular weight ethylene polymer preferably an ethylene homopolymer, both preferably with narrow molecular weight distribution and low levels of long chain branching exhibit excellent film properties and good environmental stress crack behavior superior to that expected for polyethylene of comparable density and melt flow. These resins are useful for the manufacture of film or in blow molding techniques, the production of pipes and wire coating.Type: GrantFiled: June 25, 1984Date of Patent: October 15, 1985Assignee: Phillips Petroleum CompanyInventors: Fay W. Bailey, William M. Whitte
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Patent number: 4461873Abstract: Ethylene polymer blends of a high molecular weight ethylene polymer, preferably an ethylene-mono-1-olefin copolymer, and a low molecular weight ethylene polymer preferably an ethylene homopolymer, both preferably with narrow molecular weight distribution and low levels of long chain branching exhibit excellent film properties and good environmental stress crack behavior superior to that expected for polyethylene of comparable density and melt flow. These resins are useful for the manufacture of film or in blow molding techniques, the production of pipes and wire coating.Type: GrantFiled: June 22, 1982Date of Patent: July 24, 1984Assignee: Phillips Petroleum CompanyInventors: Fay W. Bailey, William M. Whitte