Patents by Inventor Gordon D. Gruetsmacher

Gordon D. Gruetsmacher 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).

  • Preparation of erythorbic acid and ascorbis acid 6-fatty acid esters
    Patent number: 4289702
    Abstract: A process for the preparation of erythorbic acid and ascorbic acid 6-fatty acid esters using liquid anhydrous hydrogen fluoride as catalyst and solvent.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: September 15, 1981
    Assignee: Pfizer Inc.
    Inventors: Gordon D. Gruetsmacher, Charles R. Stephens