Patents by Inventor Steven P. Sawin

Steven P. Sawin 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).

  • Process for reducing polymer build-up in polymerization equipment during polymerization of alpha-olefins
    Patent number: 4956427
    Abstract: A method for the prevention of fouling of metallic surfaces exposed to reactive alpha-olefin gases during the production of polymeric resins which comprise coating such metallic surfaces with an amino silicone fluid and thereafter curing said coating by hydrolysis to form a continuous solid coating.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: September 11, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: John M. Jenkins, III, James D. McCullough, Jr., Steven P. Sawin
  • Process for reducing sheeting during polymerization of alpha-olefins
    Patent number: 4876320
    Abstract: A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the side of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: October 24, 1989
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: Bernard D. Fulks, Steven P. Sawin, Collin D. Aikman, John M. Jenkins, III
  • Process for reducing sheeting during polymerization of alpha-olefins
    Patent number: 4792592
    Abstract: A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the site of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: December 20, 1988
    Assignee: Union Carbide Corporation
    Inventors: Bernard D. Fulks, Steven P. Sawin, Collin D. Aikman, John M. Jenkins, III
  • Process for reducing sheeting during polymerization of alpha-olefins
    Patent number: 4532311
    Abstract: A process for reducing sheeting during production of polyolefins by polymerization of alpha-olefins utilizing titanium based polymerization catalysts wherein the static electric charges in the reactor at the site of possible sheet formation are maintained below static voltage levels which would otherwise cause sheet formation.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: July 30, 1985
    Assignee: Union Carbide Corporation
    Inventors: Bernard D. Fulks, Steven P. Sawin, Collin D. Aikman, John M. Jenkins, III