Patents by Inventor William G. Raper

William G. Raper 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).

  • Wastewater treatment
    Patent number: 5376275
    Abstract: An activated sludge treatment process is disclosed wherein a sewage sludge component is fermented for a period of at least 15 days to form soluble carbonaceous substrates, the fermented sludge component is contacted with influent sewage to form a conditioned sewage, and the conditioned sewage is supplied to the activated sludge plant.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: December 27, 1994
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventor: William G. Raper