Patents by Inventor Joseph Y. Chu

Joseph Y. Chu 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).

  • Elastomers and improved waterless lithographic printing masters
    Patent number: 4103616
    Abstract: Waterless lithographic printing masters of improved contrast are provided by a coating suitable master substrate with a silicone elastomer gum having reactive pendant hydroxyl or amino groups, reacting a photo and/or thermally reactive azide with said pendant groups, depositing a particulate image pattern on said silicone comprising a thermoplastic organohydrocarbon polymer and crosslinking said silicone and chemically bonding said organohydrocarbon to said silicone to form a durable imaged waterless lithographic printing master.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: August 1, 1978
    Assignee: Xerox Corporation
    Inventors: Joseph Y. Chu, Richard L. Schank