Patents by Inventor Robert A. Bannister

Robert A. Bannister 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).

  • Polyurethane-polyanhydride subbing layer for photo sensitive elements
    Patent number: 4093458
    Abstract: Polymeric subbing compositions for polyester photobase, especially polyethylene terephthalate films, comprising, a mixture of a polyurethane resin with a homopolymer or copolymer or a mixture of a homopolymer and a copolymer of an unsaturated cyclic carboxylic acid anhydride, preferably maleic anhydride or itaconic anhydride, in which the mixture contains up to 75% by weight of the anhydride polymer.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: June 6, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Patrick Terence McGrail, Stephen Richard Smith, Frederick Robert Bannister, David Leonard Boutle