Patents by Inventor Kazuo H. Takemura

Kazuo H. Takemura 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).

  • Cycloadduct precursors of cantharidin and method
    Patent number: 4298752
    Abstract: Novel cycloadducts are provided which may be formed between furan and 2,5-dihydrothiophene-3,4-dicarboxylic anhydride at elevated pressure. One of these cycloadducts is useful in a synthesis of cantharidin. Another yields a novel isomeric cantharidin.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: November 3, 1981
    Assignee: Regents of the University of California
    Inventors: William G. Dauben, Carl R. Kessel, Kazuo H. Takemura