Patents by Inventor Robert Nubel

Robert Nubel 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).

  • Fermentation process for the production of citric acid
    Patent number: 4155811
    Abstract: A process for producing citric acid directly in the free acid form by aerobically fermenting an aqueous hydrocarbon-containing nutrient medium at a low pH with a new strain of the yeast, Candida lipolytica.
    Type: Grant
    Filed: July 7, 1970
    Date of Patent: May 22, 1979
    Assignee: Pfizer Inc.
    Inventors: Robert Nubel, Robert Fitts, Gordon Findlay