Patents by Inventor Hidetoshi Kume

Hidetoshi Kume 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 preparing o-methallyloxyphenol
    Patent number: 4465867
    Abstract: A process for preparing o-methallyloxyphenol by reacting catechol with methallyl chloride in the presence of at least one of KI and NaI serving as a catalyst with use of a base, and an organic solvent or a mixture of an organic solvent and water, the process being characterized in that methallyl chloride is reacted with the catalyst after the reaction to recover the catalyst as converted to methallyl iodide and reuse the catalyst.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: August 14, 1984
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Tsukasa Maekawa, Takeshi Gondo, Shigeo Takahashi, Hidetoshi Kume
  • Process for preparing hydrazine hydrate
    Patent number: 4036936
    Abstract: Hydrazine hydrate is prepared by charging an aqueous or ketone solution of ketazine or hydrazone into a ketone recovering means, supplying the resultant solution to at least two hydrolysis reactors one after another, supplying the resultant hydrolyzed solution to an upper portion of a means for recovering hydrazine hydrate, and thereafter recovering hydrazine hydrate as an end product.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: July 19, 1977
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Hideo Yamaguchi, Hidetoshi Kume, Osamu Shibuta