Patents by Inventor Andries Gerber

Andries Gerber 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).

  • Process for treatment of sulphate-containing water
    Patent number: 6306302
    Abstract: A process for treating water having anions comprising sulfur and oxygen dissolved therein involves subjecting the anions to an anaerobic biological reduction to sulfide anions dissolved in the water, followed by a biological oxidation of the sulfide anions to elemental sulfur suspended in the water. The sulfur is separated from the water. The reduction and oxidation are effected together in a series of common reaction stages in which there are oxidizing conditions which permit the biological oxidation without preventing the biological reduction.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: October 23, 2001
    Assignee: CSIR
    Inventors: Johannes Philippus Maree, Andries Gerber