Patents by Inventor Matsuo Hirakawa

Matsuo Hirakawa 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).

  • Patent number: 4196033
    Abstract: A process for producing decorative sheets which comprises: forming a pattern on a paper for decorative use with an ink containing a vehicle resin; causing the vehicle resin in the pattern to harden on the paper; impregnating the entire paper for decorative use including the pattern with a thermosetting resin to form an impregnated paper wherein a film of still uncured thermosetting resin is formed over the pattern; assembling a laminated structure by so superposing the impregnated paper on a base material that the surface of the paper bearing the pattern will become the outer surface and further placing a planar shaping member on the paper; subjecting the laminated structure to heating and pressing thereby to cause the thermosetting resin at parts other than the pattern to cure, leaving the thermosetting resin on the pattern in still uncured state; and peeling off the planar shaping member, under heat and after the termination of the pressing, thereby to form concavities on and coincident with the pattern in
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: April 1, 1980
    Assignee: Dai Nippon Insatsu Kabushiki Kaisha
    Inventors: Eisuke Arai, Kuniaki Kamei, Kinji Matushima, Matsuo Hirakawa