Patents by Inventor Peter M. G. Day

Peter M. G. Day 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).

  • Stabilization of diazo-resin sensitizers with polyvinyl pyridine
    Patent number: 4477552
    Abstract: Light-sensitive compositions and materials incorporating such compositions, such as coated films for the production of polymeric resists, comprise a diazo-resin as a sensitizer for the composition and a water-soluble or water-dispersible colloid. In order to stabilize the diazo-resin sensitizer and increase the time between manufacture and use of such light-sensitive compositions and material, a poly-(vinylpyridine) is incorporated in the composition, preferably in the form of a water-soluble salt such as the hydrochloride or sulphate.
    Type: Grant
    Filed: October 28, 1982
    Date of Patent: October 16, 1984
    Assignee: Autotype International Limited
    Inventors: Peter M. G. Day, John W. Jones, John A. Sperry