Patents by Inventor Antony Gray

Antony Gray 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).

  • Esterification of nitrobenzoic acids
    Patent number: 3948972
    Abstract: Glycerol esters of nitrobenzoic acid are prepared by heating a mixture of a nitrobenzoic acid and glycerol in the presence of a catalytic quantity of an acid esterification catalyst which is soluble in the reaction medium at the reaction temperature. An entraining liquid having a boiling point above 100.degree.C is also present in the raction mixture. The reaction mixture is heated to a temperature above 100.degree.C so that liberated water is separated by azeotropic distillation. Surprisingly good yields are obtained using these reaction conditions.
    Type: Grant
    Filed: November 12, 1973
    Date of Patent: April 6, 1976
    Inventors: James Albert Baker, Antony Gray, John Francis Benford