Patents by Inventor Takayasu Fujimori

Takayasu Fujimori 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 dimethylnaphthalene
    Patent number: 5446226
    Abstract: A process for efficiently producing dimethylnaphthalene by a single-step reaction which comprises cyclizing dehydrogenating 5-tolyl-penta-2-ene in the presence of a catalyst comprising in combination (a) a solid acid such as crystalline aluminosilicate, silica-alumina or alumina; (b) a noble metal such as palladium and platinum; and a carrier such as carbon, silicon oxide, titanium oxide and zirconium oxide. The process results in simplification of production, effective utilization of reaction heat and rationalization of the heat balance.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: August 29, 1995
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shinji Ozawa, Makoto Takagawa, Takayasu Fujimori