Patents by Inventor Ken Okuya

Ken Okuya 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 polyester containing compositions
    Patent number: 4293636
    Abstract: A photosensitive composition comprising polyester, a half-esterified hydroxy alkyl acrylate (or methacrylate) of polybasic acid (or its anhydride), an ethylenic unsaturated bond-having vinyl monomer and a photo-polymerization initiator is especially useful for processing printed circuit boards.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: October 6, 1981
    Assignee: Tamura Kaken Co., Ltd.
    Inventor: Ken Okuya