Patents by Inventor Allan E. Nader

Allan E. Nader 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).

  • Negative photoresists containing aminoacrylate salts
    Patent number: 5399460
    Abstract: Negative photoresists, and electronic devices comprising dielectric polyimide films resulting from such photoresists. The Photoresists comprise polyamic acids, which have been neutralized with tertiary amines containing double bonds of the acrylic family, the amines including acrylamines, alkylacrylamines such as for example methacrylamines, ethacrylamines, and the like. Also methods of making such amines in high purity.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: March 21, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Paul E. Aldrich, Philip Manos, Allan E. Nader
  • Process for preparation of alkoxycarbonyloxystyrene
    Patent number: 5082965
    Abstract: The present invention provides a process for the preparation of alkoxycarbonyloxystyrene comprising reacting acyloxystyrene with a strong base to yield a phenolate to which is added an alkoxycarbonylating agent in an organic solvent and a phase transfer catalyst to yield the desired product in the organic phase.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: January 21, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Allan E. Nader, Thaliyil V. Rajanbabu