Patents by Inventor Ernest B. Campbell

Ernest B. Campbell 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).

  • Preparing glutathione monoesters
    Patent number: 5093478
    Abstract: In the esterification of glutathione with alcohol in the presence of acid catalyst, neutral glutathione monoester is isolated in high yields without the intermedite isolation of ester acid salt by treating the reaction mixture with base anion exchange resin (basic form) to neutralize the acid and bind the resulting acid anion and unesterified glutatione. Dehydrating agent is used to drive the reaction toward esterification. In the production of glutathione monester acid salts a soluble dehydrating agent is advantageously used.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: March 3, 1992
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Owen W. Griffith, Ernest B. Campbell