Patents by Inventor Susumi Otsuki

Susumi Otsuki 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).

  • Separation and recovery of 1,4-diazabicyclo-(2,2,2)-octane
    Patent number: 4216323
    Abstract: 1,4-Diazabicyclo-(2,2,2)-octane is separated and recovered by adding water to a crude 1,4-diazabicyclo-(2,2,2)-octane including an alkyl pyrazine and other amines and then, separating 1,4-diazabicyclo-(2,2,2)-octane by a distillation of water and the alkyl pyrazine and a crystallization.
    Type: Grant
    Filed: November 7, 1978
    Date of Patent: August 5, 1980
    Assignee: Toyo Soda Manufacturing Company, Limited
    Inventors: Susumi Otsuki, Shizuo Yamada, Yaichro Ono