Patents by Inventor Ritsuko Shibahara

Ritsuko Shibahara 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).

  • Hydrogenated ring-opening metathesis copolymer and process for producing the same
    Patent number: 6800720
    Abstract: A hydrogenated ring-opening metathesis polymer which contains at least a structural unit [B] of the following general formula [3] and/or a structural unit [C] of the following general formula [4]: wherein, R8 to R11 and R13 to R16 each independently represent a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, and X2s and X3s are the same or different and represent —O— or —CR122— wherein, R12 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms). One of Y1 and Y2 represents —(C═O)— and the other of Y1 and Y2 represents —CR182— wherein, R18 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms and m and n represent an integer of 0 or 1 to 3.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: October 5, 2004
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Yoshihiro Yamamoto, Tadahiro Sunaga, Tetsuya Hamada, Keiichi Ikeda, Ritsuko Shibahara, Hirofumi Io, Takashi Ochiai
  • Hydrogenated ring-opening metathesis copolymer and process for producing the same
    Publication number: 20020165328
    Abstract: 1.
    Type: Application
    Filed: March 28, 2002
    Publication date: November 7, 2002
    Inventors: Yoshihiro Yamamoto, Tadahiro Sunaga, Tetsuya Hamada, Keiichi Ikeda, Ritsuko Shibahara, Hirofumi Io, Takashi Ochiai