Patents by Inventor Susan C. Castles

Susan C. Castles 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).

  • Stabilization of optical information storage media by incorporation of nitrogen containing compounds
    Patent number: 5045440
    Abstract: Provided is a method for stabilizing an optical information medium by incorporating an effective amount of a specific nitrogen containing compound into the medium. The specific nitrogen containing compounds are poly(2-vinyl pyridine), poly(4-vinyl pyridine), pentaethylene hexamine and acridine orange base. Incorporation of one of the nitrogen compounds into the optical information medium prolongs the useful life of the medium.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: September 3, 1991
    Assignee: Hoechst Celanese Corp.
    Inventors: Frank J. Onorato, David E. Nikles, Rachel S. Kohn, Susan C. Castles, Harris A. Goldberg