Patents by Inventor Catherine C. Doyen

Catherine C. Doyen 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).

  • Stabilized 1,1,1-trichloroethane compositions
    Patent number: 4992604
    Abstract: 1,1,1-Trichloroethane (viz., methylchloroform) is stabilized with from about 2 to about 4 percent by weight 1,3-dioxolane, from about 0.25 to about 0.5 percent by weight butylene oxide, from about 0.25 to about 2 percent by weight nitromethane, from about 0.2 to about 0.75 percent by weight 1-nitropropane, from about 0.75 to about 2 percent by weight secondary butanol, and from 0 to about 100 parts per million by weight acetaldehyde dimethylhydrazone.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: February 12, 1991
    Assignee: PPG Industries, Inc.
    Inventors: Donald A. Reich, Catherine C. Doyen, Stephanie J. Oates