Patents by Inventor Keith O. Wilbourn

Keith O. Wilbourn 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 trace levels of metallic impurities in cyclized polyisoprene resin
    Patent number: 5623042
    Abstract: A process for reducing trace levels of metallic impurities in cyclized polyisoprene resin is disclosed. The process reduces trace levels of metallic impurities in cyclized polyisoprene resin by washing an impure organic solvent/cyclized polyisoprene resin solution at least once with a heated aqueous acidic solution, and subsequently washing the resin at least once with heated water.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: April 22, 1997
    Assignee: Olin Corporation
    Inventors: Keith O. Wilbourn, James M. Davidson, Richard W. Roberts
  • Process of making selected poly(dianhydrides) compounds
    Patent number: 5336787
    Abstract: A process of making poly(dianhydride) compounds having formulae (I) and (II): ##STR1## where m is 0 to 50. ##STR2## wherein n is 0 to 20 and X is bond junction, oxygen atom, sulfur atom, SO.sub.2, C(CF.sub.3), CO, C(CH.sub.3).sub.2, CF.sub.2 --O--CF.sub.2, CH.sub.2, and CHOH.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: August 9, 1994
    Assignee: Olin Corporation
    Inventors: Murray A. Ruggiero, Renata C. Stegmeier, Bruce A. Marien, Keith O. Wilbourn
  • Selected poly(dianhydride) compounds terminated with reactive end groups
    Patent number: 5284959
    Abstract: Poly(dianhydride) compounds having formulae (I) and (II): ##STR1## where m is 0 to 50. ##STR2## wherein n is 0 to 20 and X is bond junction, oxygen atom, sulfur atom, SO.sub.2, C(CF.sub.3), CO, C(CH.sub.3).sub.2, CF.sub.2 --O--CF.sub.2, CH.sub.2, and CHOH.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: February 8, 1994
    Assignee: Olin Corporation
    Inventors: Bruce A. Marien, Keith O. Wilbourn
  • Selected poly(dianhydrides) compounds, selected poly(amic acid) compounds, and selected poly(imide) compounds
    Patent number: 5239049
    Abstract: Poly(dianhydride) compounds having formulae (I) and (II): ##STR1## where m is 0 to 50. ##STR2## wherein n is 0 to 20 and X is bond junction, oxygen atom, sulfur atom, SO.sub.2, C(CF.sub.3), CO, C(CH.sub.3).sub.2, CF.sub.2 --O--CF.sub.2, CH.sub.2, and CHOH.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: August 24, 1993
    Assignee: Olin Corporation
    Inventors: Bruce A. Marien, Keith O. Wilbourn
  • Selected poly(dianhydrides)
    Patent number: 5206335
    Abstract: Poly(dianhydride) compounds having formulae (I) and (II): ##STR1## where m is 0 to 50. ##STR2## wherein n is 0 to 20 and X is bond junction, oxygen atom, sulfur atom, SO.sub.2, C(CF.sub.3), CO, C(CH.sub.3).sub.2, CF.sub.1 --O--CF.sub.2, CH.sub.2, and CHOH.The compounds are intermediates for certain resins.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: April 27, 1993
    Assignee: Olin Corporation
    Inventors: Bruce A. Marien, Keith O. Wilbourn