Patents by Inventor Hirotaro Narabayashi

Hirotaro Narabayashi 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).

  • Threo-adrenalinecarboxylic acid, and the production and uses thereof
    Patent number: 4833268
    Abstract: DL- or L-Threo-3-(3,4-dihydroxyphenyl)-N-methyl-serine which may also be termed as DL- or L-threo-adrenalinecarboxylic acid are now provided, which are new compounds useful for therapeutic treatment of Parkinson's disease and mental depression disease.
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: May 23, 1989
    Assignee: Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
    Inventors: Hamao Umezawa, Toshiharu Nagatsu, Hirotaro Narabayashi, Tomio Takeuchi, Shuichi Iwadare, Ikuo Matsumoto, Junji Yoshizawa, Hajime Morishima, Koji Tomimoto
  • Antiparkinsonian agent
    Patent number: 4497826
    Abstract: An antiparkinsonian agent comprising DL- or L-threo-3,4-dihydroxyphenylserine and a decarboxylase inhibitor (e.g. carbidopa and benserazide), which is useful for the treatment of parkinson's disease, particularly treatment of the freezing phenomenon which has not previously been cured by the conventional antiparkinsonian drugs such as L-DOPA.
    Type: Grant
    Filed: September 8, 1982
    Date of Patent: February 5, 1985
    Assignees: Sumitomo Chemical Company, Limited, Hirotaro Narabayashi, Tomoyoshi Kondo, Akira Hayashi, Tomokazu Suzuki
    Inventors: Hirotaro Narabayashi, Tomoyoshi Kondo, Akira Hayashi, Tomokazu Suzuki