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).

  • Patent number: 10184018
    Abstract: 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: Grant
    Filed: December 15, 2016
    Date of Patent: January 22, 2019
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Publication number: 20170096512
    Abstract: 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: Application
    Filed: December 15, 2016
    Publication date: April 6, 2017
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Patent number: 9550849
    Abstract: 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: Grant
    Filed: January 14, 2016
    Date of Patent: January 24, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Publication number: 20160122454
    Abstract: 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: Application
    Filed: January 14, 2016
    Publication date: May 5, 2016
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Patent number: 9273170
    Abstract: 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: Grant
    Filed: March 12, 2014
    Date of Patent: March 1, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Publication number: 20150259455
    Abstract: 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: Application
    Filed: March 12, 2014
    Publication date: September 17, 2015
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
  • Publication number: 20040059070
    Abstract: 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: Application
    Filed: May 20, 2003
    Publication date: March 25, 2004
    Inventors: William M. Whitte, Steven J. Secora, Rebecca L. Jones
  • Patent number: 6355359
    Abstract: 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: Grant
    Filed: October 31, 2000
    Date of Patent: March 12, 2002
    Assignee: Phillips Petroleum Company
    Inventors: 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
  • Patent number: 6248840
    Abstract: 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: Grant
    Filed: December 28, 1998
    Date of Patent: June 19, 2001
    Assignee: Phillips Petroleum Company
    Inventors: Ashish M. Sukhadia, M. Bruce Welch, William M. Whitte, Syriac J. Palackal, William R. Coutant
  • Patent number: 6214469
    Abstract: 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: Grant
    Filed: January 15, 1998
    Date of Patent: April 10, 2001
    Assignee: Phillips Petroleum Company
    Inventors: 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
  • Patent number: 5654249
    Abstract: 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: Grant
    Filed: May 25, 1995
    Date of Patent: August 5, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Kent W. Rollmann, Elizabeth A. Benham, William M. Whitte, Max P. McDaniel, William R. Coutant, F. Wallace Bailey
  • Patent number: 5508362
    Abstract: 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: Grant
    Filed: October 8, 1993
    Date of Patent: April 16, 1996
    Assignee: Phillips Petroleum Company
    Inventors: Kent W. Rollmann, Elizabeth A. Benham, William M. Whitte, Max P. McDaniel, William R. Coutant, F. Wallace Bailey
  • Patent number: 4598128
    Abstract: 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: Grant
    Filed: March 14, 1983
    Date of Patent: July 1, 1986
    Assignee: Phillips Petroleum Company
    Inventors: James C. Randall, William M. Whitte
  • Patent number: 4547551
    Abstract: 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: Grant
    Filed: June 25, 1984
    Date of Patent: October 15, 1985
    Assignee: Phillips Petroleum Company
    Inventors: Fay W. Bailey, William M. Whitte
  • Patent number: 4461873
    Abstract: 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: Grant
    Filed: June 22, 1982
    Date of Patent: July 24, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Fay W. Bailey, William M. Whitte