Patents by Inventor Bertrand J. Hall

Bertrand J. Hall 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).

  • Recovery of caffeine from caffeine adsorbents
    Patent number: 4443601
    Abstract: Caffeine adsorbed on caffeine adsorbents is recovered by contacting the carbon with a solvent, preferably an aqueous solution of ethylene carbonate or propylene carbonate. The caffeine adsorbent is contacted with the solvent for a period time sufficient to remove at least a portion of the caffeine adsorbed thereon and then separated from caffeine-containing solvent. The caffeine may be recovered from the solvent by precipitation.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: April 17, 1984
    Assignee: General Foods Corporation
    Inventors: Mark H. Karmiol, Gary L. Hickernell, Bertrand J. Hall