Patents by Inventor Derek John Walbridge

Derek John Walbridge 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).

  • Photocurable pigmented coating compositions
    Patent number: 3998979
    Abstract: Pigmented coating compositions cureable in visible light which comprise as film former an unsaturated oil-modified alkyd resin, a polyurethane oil, polybutadiene or allyl ether-containing unsaturated polyester and a photosensitizer of structure ##STR1## wherein A is benzenoid or heterocyclic of benzenoid character.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: December 21, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin Armstrong, Peter Francis Nicks, Derek John Walbridge