Patents by Inventor Sigenobu Mizusaki

Sigenobu Mizusaki 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).

  • Process for reducing aldehydes or ketones
    Patent number: 4877909
    Abstract: A process for reducing an aldehyde or ketone in the presence of a stable, highly active catalyst which is insoluble in a solvent and which can be recovered easily from the reaction system after completion of the reaction and used repeatedly, characterized in that an aldehyde or ketone having a carbonyl group is reacted with an alcohol in the presence of hydrous zirconium oxide as the catalyst.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: October 31, 1989
    Assignee: Japan Tobacco, Inc.
    Inventors: Sigenobu Mizusaki, Hajime Matsushita, Shigeo Ishiguro, Hiroshi Ichinose, Akira Izumi
  • Desmosine derivatives and reagent for preparing artificial antigens
    Patent number: 4841055
    Abstract: A novel desmosine derivative, which is useful for preparing a desmosine artificial antigen, has an activated, disulfide bond on the side chain at 3 or 5 position of the pyridinium ring. The derivative can combine with a polymer having thiel groups by a disulfide bond to form the effective artificial antigen.
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: June 20, 1989
    Assignee: Japan Tobacco Inc.
    Inventors: Takashi Matsumoto, Takashi Okada, Sigenobu Mizusaki