Patents by Inventor Diane A. Kooker

Diane A. Kooker 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).

  • Cured polyester plastic compositions derived from recycled polyurethanes
    Patent number: 5859167
    Abstract: Cured, thermoset plastic articles derived from scrap polyurethanes are disclosed. The polyurethane is converted to a liquified mixture containing digested polyurethane and cyclic, unsaturated anhydride. A Lewis acid then catalyzes insertion of the cyclic, unsaturated anhydride into the polyether backbone of the polyurethane to give a liquid, unsaturated resin. The unsaturated resin can cured with a vinyl monomer in the presence of a free-radical initiator to give a cured, thermoset plastic.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: January 12, 1999
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Lau S. Yang, Diane A. Kooker