Patents by Inventor Shigeru Nomura

Shigeru Nomura 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).

  • Process for preparing a substrate for optical recording media
    Patent number: 4743409
    Abstract: A process for preparing a substrate for optical recording media which comprises injection-molding a polyvinylacetal resin resulting from acetalization of polyvinylalcohol to a degree of at least 60 mole % with at least one acetalizing agent selected from the group consisting of aliphatic aldehydes, alicyclic aldehydes, aromatic aldehydes and heterocyclic aldehydes.
    Type: Grant
    Filed: June 10, 1986
    Date of Patent: May 10, 1988
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shigeru Nomura, Tetsuo Kadoya, Takeo Kinoshita
  • Interlayer film for laminated glass
    Patent number: 4452935
    Abstract: An interlayer film for a laminated glass, which comprises polyvinyl butyral and a plasticizer and has a T peel strength at 20.degree. C. of not more than 0.5 kg/cm, said polyvinyl butyral satisfying the following expressionY.gtoreq.-3X+486wherein X is the degree of butyralization in mole % and Y is the half-value width in cm.sup.-1 of hydroxyl absorption in the infrared absorption spectrum of the polyvinyl butyral in which the ordinate represents the transmittance and the abscissa represents the wave number.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: June 5, 1984
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shigeru Nomura, Masashi Miyakawa, Ken-ichi Asahina