Patents by Inventor Kenji Dnamasa

Kenji Dnamasa 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 production of dimethyltetralin
    Patent number: 5396008
    Abstract: There is disclosed a process for producing dimethyltetralin consisting of 1,5-, 1,6- and 2,6-dimethyltetralin which comprises cyclizing 5-tolyl-penta-2-ene in gaseous state in the presence of diluent by the use of a catalyst comprising a crystalline aluminosilicate and a carrier and optionally a molding assistant. The abovementioned process is capable of producing industrially useful dimethyltetralin as the starting raw material for dimethylnaphthalene with high yield and high selectivity with minimized side reactions over a long stabilized period.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: March 7, 1995
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Shinji Ozawa, Makoto Takagawa, Kenji Dnamasa