Patents by Inventor Glyndal D. Cowan

Glyndal D. Cowan 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).

  • Olefin production process
    Patent number: 7718838
    Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: May 18, 2010
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: William M. Woodard, Warren M. Ewert, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
  • Olefin production process
    Patent number: 7157612
    Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: January 2, 2007
    Assignee: Phillips Petroleum Company
    Inventors: Warren M. Ewert, William M. Woodard, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
  • Olefin production process
    Publication number: 20040228775
    Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
    Type: Application
    Filed: June 18, 2004
    Publication date: November 18, 2004
    Inventors: Warren M. Ewert, William M. Woodard, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
  • OLEFIN PRODUCTION PROCESS
    Publication number: 20020182124
    Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
    Type: Application
    Filed: October 14, 1997
    Publication date: December 5, 2002
    Inventors: WILLIAM M. WOODARD, WARREN M. EWERT, HARVEY D. HENSLEY, MARK E. LASHIER, BRUCE E. KREISCHER, GLYNDAL D. COWAN, JEFFREY W. FREEMAN, RALPH V. FRANKLIN, RONALD D. KNUDSEN, RICHARD L. ANDERSON, LYLE R. KALLENBACH
  • Olefin production
    Patent number: 6455648
    Abstract: A process is provided which comprises preparing an olefin oligomerization or trimerization catalyst system and producing olefins in the presence of the olefin oligomerization or trimerization catalyst system and a solvent, wherein said catalyst system preparation comprises the steps of first contacting a chromium source and a pyrrole-containing compound to form a chromium/pyrrole mixture; second, contacting said chromium/pyrrole mixture with a metal alkyl to form a catalyst system; and then contacting said catalyst system with an alpha-olefin, preferably ethylene.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: September 24, 2002
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Jeffrey W. Freeman, Warren M. Ewert, Bruce E. Kreischer, Ronald D. Knudsen, Glyndal D. Cowan
  • Solid-fluid contacting apparatus
    Patent number: 4066417
    Abstract: In a batch process in which fluid is contacted with solid particles in a vessel and withdrawn therefrom through a passageway, the passageway is provided with filtering means to prevent solid particles from escaping. The next batch of feed is introduced into the vessel through the same passageway causing displacement of the particles retained by the filtering means and carrying them back into the contacting zone of the vessel.
    Type: Grant
    Filed: May 4, 1976
    Date of Patent: January 3, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Charles A. Drake, Glyndal D. Cowan