Patents by Inventor Margaret Ruth Haddon

Margaret Ruth Haddon 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 film adhesives
    Patent number: 5674623
    Abstract: A solid photocurable film adhesive comprising (I) a photocurable material having, on average, more than one acrylic group per molecule, at least 20% by weight of said material being a urethane acrylate, a polyester acrylate or a mixture of a urethane acrylate and a polyester acrylate, (II) as sole or major solid film-forming component, a solid polyvinylacetal and (III) a photoinitiator for photopolymerisation of acrylic compounds.The film adhesive is useful in the production of data-carrying laminates such as identity cards.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: October 7, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Margaret Ruth Haddon, Terence James Smith