Patents by Inventor William S. Kalema

William S. Kalema 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).

  • Enhanced extraction of valeric acid or caproic acid from aqueous mixtures
    Patent number: 5254255
    Abstract: Extraction of valeric and/or caproic acid from an aqueous solution containing adipic acid and/or methyl glutaric acid using an organic solvent is enhanced by carrying out the process using an extraction-enhancing acid, such as acetic or isobutyric acid, which is soluble in the organic solvent.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: October 19, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William S. Kalema, Leon S. Scott