Patents by Inventor Yia C. Ray

Yia C. Ray 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 preparing a strengthened polyimide film containing organometallic compounds for improving adhesion
    Patent number: 5272194
    Abstract: A strengthened polyimide film is described, which has improved adhesion when bonded to a metal foil through a heat-resistant adhesive, containing from 0.02 to 1% by weight, based on the weight of the film, of an organo-metallic compound wherein the metal is tin, bismuth or antimony. A process for preparing a strengthened polyimide film is also described wherein an organometallic compound is introduced into a film-forming polyamic acid polymer prior to the casting step.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: December 21, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Anthony J. Arduengo, III, Yia C. Ray