Patents by Inventor Chieko Ono

Chieko Ono 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 preparing esters
    Patent number: 4216337
    Abstract: A process for preparing esters which comprises reacting a polycarboxylic acid with an alcohol, removing the unreacted alcohol from the resultant esterification reaction mixture, heating the crude ester at a temperature of 160.degree. to 340.degree. C., contacting the heat-treated crude ester with an adsorbent, and recovering the ester of high purity. The ester obtained has superior electrical insulation, transparency and thermal stability.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: August 5, 1980
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Makoto Baba, Teruyuki Ninomiya, Chieko Ono