Patents by Inventor Jun-ichi Minamikawa

Jun-ichi Minamikawa 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).

  • Processes for the preparation of fluorinated benzoic acids
    Patent number: 6333431
    Abstract: An object of the present invention is to provide a commercially advantageous process for preparing a fluoro benzoic acid. The process according to the present invention comprises either alkylating a fluoro benzoic acid of the formula wherein R1 is halogen, or reducing a fluoro benzoic acid of the formula wherein R1 is as defined above and R2 is lower alkyl to thereby produce a fluoro benzoic acid represented by the formula wherein R1 and R2 are as defined above.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: December 25, 2001
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Akihiro Hashimoto, Satoshi Matsuda, Kuninori Tai, Hitoshi Tone, Takao Nishi, Jun-ichi Minamikawa, Michiaki Tominaga