Patents by Inventor Masayoshi Ohshima

Masayoshi Ohshima 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).

  • Ring-opening polymer and a process for production thereof
    Patent number: 5599882
    Abstract: The present invention discloses a polycyclic norbornene-based ring-opening polymer which comprises(A) 90-5% by mol of a repeating unit represented by the following formula [I] or the alkyl-substituted derivative thereof, and(B) 10-95% by mol of at least one repeating unit selected from a repeating unit represented by the following formula [II], the alkyl-substituted derivative thereof, a repeating unit represented by the following formula [III], the alkyl-substituted derivative thereof, or the alkylidene-substituted derivative thereof, and which has an intrinsic viscosity [.eta.] of 0.01-20 dl/g as determined in toluene at 25.degree. C., the hydrogenation products thereof, and a process for production thereof ##STR1## wherein ------ denotes a single bond or a double bond.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: February 4, 1997
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yoshikatsu Nishi, Masayoshi Ohshima, Teiji Kohara, Toshiyasu Matsui, Tadao Natsuume