Patents by Inventor Toshiharu Yamasaki

Toshiharu Yamasaki 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 the preparation of dialkyl oxalates
    Patent number: 4138587
    Abstract: A process for the preparation of dialkyl oxalates by reacting an aliphatic alcohol with carbon monoxide under pressure, which comprises carrying out the reaction in the presence of(a) a catalyst comprising a platinum group metal or a salt thereof, and(b) an accelerator composed of one or more compounds selected from the group consisting of nitric acid and nitrogen oxides.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: February 6, 1979
    Assignee: Ube Industries, Ltd.
    Inventors: Toshiharu Yamasaki, Masao Eguchi, Schinichiro Uchiumi, Keigo Nishihira, Masayoshi Yamashita, Hiroshi Itatani