Patents by Inventor Takayoshi Osaki

Takayoshi Osaki 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 producing isoprene
    Patent number: 4593145
    Abstract: A process for producing isoprene in good yield is provided. The process is characterized in that an alkyl tertiary butyl ether and a formaldehyde source are fed, together with water, into a acidic aqueous solution continuously or intermittently while maintaining the reaction pressure in an adequate range and at the same time distilling off the product isoprene, unreacted starting materials, isobutene and tertiary butanol, together with water, from the reaction zone.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: June 3, 1986
    Assignee: Kuraray Company Limited
    Inventors: Yoichi Ninagawa, Osamu Yamada, Tsumoru Renge, Sunao Kyo, Takayoshi Osaki, Koichi Kushida
  • Process for producing isoprene
    Patent number: 4511751
    Abstract: A process for producing isoprene in good yield is provided. The process is characterized in that isobutene and/or tertiary butanol and a formaldehyde source are fed, together with water, into an acidic aqueous solution continuously or intermittently while maintaining the reaction pressure in an adequate range and at the same time distilling off the product isoprene and unreacted starting materials, together with water, from the reaction zone.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: April 16, 1985
    Assignee: Kuraray Company, Ltd.
    Inventors: Yoichi Ninagawa, Osamu Yamada, Tsumoru Renge, Sunao Kyo, Takayoshi Osaki, Koichi Kushida