Patents by Inventor by Mary E. Fitzgerald, surviving spouse

by Mary E. Fitzgerald, surviving spouse 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).

  • Polybenzimida zoquinazolines and prepolymers for making same
    Patent number: 4017466
    Abstract: Highly cross-linked, infusible, poly(benzimidazoquinazolines) are made by heat polymerizing fusible condensation prepolymers and pre-copolymers which, in turn, are made by the melt condensation of bis-2(o-aminoaryl)imidazoles with (a) aryl esters of extended aromatic carboxylic acids having a carboxyl functionality greater then two or (b) a mixture of the latter acid esters and aryl esters of aromatic dicarboxylic acids, respectively. The prepolymers and pre-copolymers may be employed to form laminates, molded articles, etc., having high strength and high temperature characteristics.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: April 12, 1977
    Assignee: Whittaker Corporation
    Inventors: Robert J. Milligan, Walter P. Fitzgerald, Jr., deceased, by Mary E. Fitzgerald, surviving spouse