Patents by Inventor Maurice J. Gourbault

Maurice J. Gourbault 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 the preparation of .alpha.-aspartyl phenylalanine methyl ester
    Patent number: 4507231
    Abstract: The present invention relates to a process for the preparation of .alpha.-aspartyl phenylalanine methyl ester by reacting phenylalanine methyl ester with the anhydride of N-formyl L-aspartic acid, process wherein the product from said reaction is treated in at least one ion-exchanging resin column and the .beta.-isomer contained in the resulting mixture is isomerized by treatment with acetic anhydride followed by an acid hydrolysis to convert said .beta.-isomer into .alpha.-isomer and ensure the deformylation of said product.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: March 26, 1985
    Assignee: Laboratoires Fournier S.A.
    Inventor: Maurice J. Gourbault