Patents by Inventor Miki Fukuta

Miki Fukuta 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 producing cis-4,5-dihydro-4,5-dihydroxyphthalic acid
    Patent number: 5037748
    Abstract: A process for producing cis-4,5-dihydro-4,5-dihydroxyphthalic acid which comprises producing cis-4,5-dihydro-4,5-dihydroxyphthalic acid and/or a salt thereof from phthalic acid and/or a salt thereof using a microorganism whose activity to decompose cis-4,5-dihydro-4,5-dihydroxyphthalic acid and/or a salt thereof has disappeared or diminished, acidifying the product system unless it is acidic, and then extracting therefrom cis-4,5-dihydro-4,5-dihydroxyphthalic acid with such an organic solvent that it is miscible with water in any proportion and the mixture of the organic solvent with water can be separated into two layers upon adding a salt thereto, in the presence of a salt, or with an alcohol having 4 carbon atoms. The process enables one to produce cis-4,5-dihydro-4,5-dihydroxyphthalic acid from phthalic acid and/or its salt in a high yield.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: August 6, 1991
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Minoru Matsubara, Tohru Masukawa, Norihiko Adachi, Miki Fukuta, Masao Kariya, Tohru Kodama, Toshio Omori