Patents by Inventor Kiyofumi Takaki

Kiyofumi Takaki 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 radiation-sensitive resin composition and radiation-sensitive sheet material
    Patent number: 4370403
    Abstract: A photopolymerizable radiation-sensitive resin composition comprising a styrene-maleic acid copolymeric resin as well as an ethylenically unsaturated compound and a photopolymerization initiator is disclosed. A radiation-sensitive sheet material comprising a support (10) having coated thereon a layer (11) of the photopolymerizable radiation-sensitive resin composition is also disclosed. The composition and sheet material disclosed herein can be conveniently used particularly in the preparation of various cards such as credit cards, banking or cash cards and the like.TECHNICAL FIELDThe present invention relates to a photopolymerizable radiation-sensitive resin composition and a radiation-sensitive sheet material comprising a layer of such composition.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: January 25, 1983
    Assignees: Tokuji Arai, Birger Takle
    Inventor: Kiyofumi Takaki