Patents by Inventor Tsunehiko Masatomi

Tsunehiko Masatomi 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).

  • Cyclohexadiene derivatives and process for preparing the same
    Patent number: 4475992
    Abstract: Cyclohexadiene derivatives represented by the formula (I) ##STR1## (wherein --X-- represents ##STR2## --Y-- represents ##STR3## and R.sup.1 and R.sup.2 represent a lower alkyl group) and a process for preparing the same.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: October 9, 1984
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Mitsuo Akada, Tsunehiko Masatomi, Yasuo Shimizu, Shigeru Torii, Hideo Tanaka
  • Cyclohexadiene derivatives and process for preparing the same
    Patent number: 4429164
    Abstract: Cyclohexadiene derivatives represented by the formula (I) ##STR1## (wherein --X-- represents ##STR2## --Y-- represents ##STR3## and R.sup.1 and R.sup.2 represent a lower alkyl group) and a process for preparing the same.
    Type: Grant
    Filed: June 22, 1982
    Date of Patent: January 31, 1984
    Assignee: Otsuka Kagaku Yakuhin Kabushini Kaisha
    Inventors: Shigeru Torii, Hideo Tanaka, Mitsuo Akada, Tsunehiko Masatomi, Yasuo Shimizu
  • 2,2'-Bis(3,4-Epoxy-5-oxotetrahydropyran)ethers
    Patent number: 4150039
    Abstract: 2,2'-BIS(3,4-Epoxy-5-oxotetrahydropyran)ethers represented by the formula ##STR1## wherein R is hydrogen atom or straight-chain or branched-chain alkyl having 1 to 6 carbon atoms; a process for preparing the same.
    Type: Grant
    Filed: May 24, 1977
    Date of Patent: April 17, 1979
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Rokuro Harima, Takeshi Misawa, Tsunehiko Masatomi, Yasuo Shimizu, Yoshifumi Nakacho, Hisashi Takao, Kenji Kase