Patents by Inventor Larry N. Hawkins

Larry N. Hawkins 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).

  • Production of polyol polyesters having reduced color content
    Patent number: 4931552
    Abstract: Polyol polyesters having reduced color content are prepared by base-catalyzed transesterification of lower (i.e., C.sub.1 -C.sub.3) alkyl fatty esters having a carbonyl content of less than about 200 ppm with polyols. The esters can be prepared by a pretreatment comprising distilling the said alkyl fatty esters (in a liquid state), preferably with a base, and discarding both the top cut in an amount that is about 5% or less and at least about 2% of the still bottoms.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: June 5, 1990
    Assignee: The Procter & Gamble Company
    Inventors: Michael S. Gibson, Larry N. Hawkins, Marjorie M. Peffly, Corey J. Kenneally, Patrick J. Corrigan