Patents by Inventor Junji Maekawa

Junji Maekawa 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 ethyl esters of aliphatic carboxylic acids
    Patent number: 4205182
    Abstract: In a process for producing an ethyl ester of an aliphatic carboxylic acid which comprises reacting ethylene with the aliphatic carboxylic acid in the liquid phase in the presence of an acid catalyst, the improvement wherein a heteropolyacid of tungsten or an acidic metal salt thereof is used as the acid catalyst, and the reaction is carried out in the presence of water in an amount of up to 7.5% by weight based on the weight of the aliphatic carboxylic acid.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: May 27, 1980
    Assignee: Celanese Corporation
    Inventors: Yusuke Izumi, Junji Maekawa, Katsumi Suzuki