Patents by Inventor Margaret Kenley Leggett

Margaret Kenley Leggett 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).

  • Polymeric shaped articles
    Patent number: 4062826
    Abstract: A shaped polymeric article of a gel-polymerisate of a homogeneous mixture comprisingA. from 5% to 95% by weight of polyurethane precursors comprising at least one polyfunctional compound and at least one polyisocyanate of the structure ##STR1## where X is a divalent radical, preferably --CH.sub.2 --, said precursors being capable of forming a cross-linked polyurethane having a glass-rubber transition temperature of at least 25.degree. C, preferably at least 35.degree. C, andB. from 95% to 5% by weight of cured polyester resin precursors, comprisingI. at least one ethylenically unsaturated polyester, andIi. at least one vinyl monomer.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: December 13, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: Francis Gowland Hutchinson, Richard George Cleveland Henbest, Margaret Kenley Leggett