Patents by Inventor Katuhiro Yamashita

Katuhiro Yamashita 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).

  • Photopolymerizable composition
    Patent number: 4987056
    Abstract: A photopolymeric composition having improved sensitivity to a visible light ray which comprises:(a) at least one ethylenic unsaturated compound which is non-gaseous at a normal temperature;(b) at least one metallic arene compound;(c) a compound selected from the group consisting of p-aminophenyl unsaturated detone compounds, pyridine derivatives or salts thereof, xanthene or thioxanthene compounds and mixtures thereof; and optionally(d) a compound selected from the group consisting of phenylglycine derivatives, cyclic diketone compounds and mixtures thereof.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: January 22, 1991
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Satoshi Imahashi, Atsushi Saito, Katuhiro Yamashita