Patents by Inventor Pride D. Johnson

Pride D. Johnson 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 lactate esters and lactic acid from fermentation broth
    Patent number: 5210296
    Abstract: The production of high purity lactate ester or lactic acid from a concentrated fermentation broth by continuous acidification in the presence of an alcohol diluent with sequential or simultaneous esterification, distillation off of high purity ester, and, if desired, hydrolysis of the ester to high purity lactic acid.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: May 11, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael C. M. Cockrem, Pride D. Johnson