Patents by Inventor Gino Agnese

Gino Agnese 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).

  • Two stage process for preparing 2,6-pyridinedicarboxylic acid
    Patent number: 4419515
    Abstract: This invention relates to a two stage process for preparing 2,6-pyridinedicarboxylic acid or dipicolinic acid from 2,6-dimethyl-pyridine through oxidation of the latter in an acid environment with hexavalent chromium salts and formation of a molar addition compound between dicarboxylic acid, being formed by oxidation, and chromic anhydride in the first stage, and subsequent hot hydrolysis of the addition product so obtained, thus isolating 2,6-pyridinedicarboxylic acid therefrom in the second stage. The invention also comprises the above mentioned intermediate complex addition compound and the 2,6-pyridinedicarboxylic acid of high purity, obtained by the process according to said invention.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: December 6, 1983
    Assignee: Luigi Stoppani S.p.A.
    Inventors: Giovanni Ghelli, Enrico Bruschi, Gino Agnese
  • Two stage process for preparing 2,6-pyridin-dicarboxylic acid
    Patent number: 4237301
    Abstract: This invention relates to a two stage process for preparing 2,6-pyridin-dicarboxylic acid or dipicolinic acid from 2,6-dimethyl-pyridine through oxidation of the latter in an acid environment with hexavalent chromium salts and formation of a molar addition compound between dicarboxylic acid, being formed by oxidation, and chromic anhydride in the first stage, and subsequent hot hydrolysis of the addition product so obtained, thus isolating 2,6-pyridin-dicarboxylic acid therefrom in the second stage. The invention also comprises the above mentioned intermediate complex addition compound and the 2,6-pyridin-dicarboxylic acid of high purity, obtained by the process according to said invention.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: December 2, 1980
    Assignee: Luigi Stoppani S.p.A.
    Inventors: Giovanni Ghelli, Enrico Bruschi, Gino Agnese