Patents by Inventor Derek J. Walbridge

Derek J. 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).

  • Shaped polymeric articles made by two-stage photopolymerization
    Patent number: 4233396
    Abstract: A photocureable article which is of simple shape and is capable of being further shaped is formed by partially polymerizing a composition comprising photopolymerizable liquid in the presence of a photosensitive catalyst and then protecting the article from further irradiation. The article may be fibre-reinforced. The article may be subsequently shaped and further cured to produce a rigid article.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: November 11, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: Colin Armstrong, Derek J. Walbridge