Patents by Inventor Shotaro Urawa

Shotaro Urawa 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).

  • Maleic acid-modified polyolefin and process for the preparation of the same
    Patent number: 4751270
    Abstract: A maleic acid-modified polyolefin prepared by graft polymerization of maleic anhydride to polyolefin in the presence of a compound having the formula (I): ##STR1## in which each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group having 1-6 carbon atoms; and each of X and Y is independently any one of the hydrogen atom, an alkyl group having 1-6 carbon atoms and a halogen atom. A process for the preparation of said maleic acid-modified polyolefin is also disclosed.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: June 14, 1988
    Assignee: Ube Industries, Ltd.
    Inventors: Shotaro Urawa, Keiichi Nagata, Noboru Yamaguchi