Patents by Inventor Frederick A. Keller, Jr.

Frederick A. Keller, Jr. 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).

  • Mutant strain of Clostridium thermoaceticum useful for the preparation of acetic acid
    Patent number: 4513084
    Abstract: A biologically pure mutant of C. thermoaceticum (ATCC No. 39,289) useful for the production of acetic acid by a fermentation reaction. This mutant is capable of growing at a pH below 5.0 and shows a specific growth rate of at least 0.30 hr.sup.-1 when continuously cultured under optimum conditions.
    Type: Grant
    Filed: March 11, 1983
    Date of Patent: April 23, 1985
    Assignee: CPC International Inc.
    Inventors: Frederick A. Keller, Jr., Jeffrey S. Ganoung, Susan J. Luenser
  • Acetic acid by fermentation
    Patent number: 4371619
    Abstract: Acetic acid has been prepared by a fermentation process using Clostridium thermoaceticum in a varied form obtained by repeated fermentations under anaerobic conditions and low redox potentials at successively more acidic pH's than the original organism.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: February 1, 1983
    Assignee: Union Carbide Corporation
    Inventors: Robert D. Schwartz, Frederick A. Keller, Jr.