Patents by Inventor Karen E. Medema

Karen E. Medema 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).

  • Unsaturated polyester resin compositions
    Patent number: 6358620
    Abstract: This invention is chemically resistant thermosetting resins having low contents of volatile organic components comprising (i) a minor amount by weight of ethylenically unsaturated reactive solvent, (ii) a major amount by weight of an unsaturated polyester produced by a process which comprises; (a) condensing dihydric alcohol with at least one dicarboxylic acid and/or anhydride of dicarboxylic acid to form a condensation polymer having an acid number (AN) in a range upward from about 5 mg KOH/g polymer, and (b) reacting the condensation polymer with an amount of glycidyl methacrylate such that the weight ratio of glycidyl methacrylate to condensation polymer is in a range of from about 0.001 AN to about 0.005 AN.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: March 19, 2002
    Assignee: BP Corporation North America Inc.
    Inventors: Howard B. Yokelson, James Van Fleet, Karen E. Medema