Patents by Inventor Koji Toyama

Koji Toyama 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).

  • Direct image offset printing plates
    Patent number: 4686138
    Abstract: There is disclosed a direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises an inorganic pigment and a mixed binder comprising a water-soluble high polymer compound and a synthetic high polymer latex. There is also disclosed a direct image printing plate for offset printing which comprises a water resistant support and an image receiving layer provided thereon which comprises a mixed pigment comprising a synthetic silica fine powder of 20.mu. or less in particle diameter and a colloidal silica of 50 m.mu. or less in particle diameter and a binder which is preferably polyvinyl alcohol.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: August 11, 1987
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Koji Toyama, Hideo Shimizu
  • Electrophotographic offset masters
    Patent number: 4520089
    Abstract: Disclosed is an electrophotographic offset master which contains sericite or sericite-containing inorganic pigment as pigment component in back coat layer. This offset master has no fogging on the photosensitive layer and thus causes no stains on printed copies.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: May 28, 1985
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Shoji Tazuki, Koji Toyama