Patents by Inventor Paul Douglas Gilbert

Paul Douglas Gilbert 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).

  • Treatment of sewage sludges
    Patent number: 7740762
    Abstract: The present invention provides a method of reducing the pathogen content of sewage sludge comprising (a) adding to the sludge an effective amount of a phosphorous-containing compound and (b) keeping the phosphorous-containing compound in contact with the sludge for a sufficient time to reduce the amount of pathogens present in the sludge by an amount equivalent to a logarithmic reduction of 2 or more.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: June 22, 2010
    Assignee: Rhodia UK Limited
    Inventors: Stephanie Edmunds, Paul Douglas Gilbert, Robert Eric Talbot
  • Treatment of Sewage Sludges
    Publication number: 20080257001
    Abstract: The present invention provides a method of reducing the pathogen content of sewage sludge comprising (a) adding to the sludge an effective amount of a phosphorous-containing compound and (b) keeping the phosphorous-containing compound in contact with the sludge for a sufficient time to reduce the amount of pathogens present in the sludge by an amount equivalent to a logarithmic reduction of 2 or more.
    Type: Application
    Filed: December 16, 2005
    Publication date: October 23, 2008
    Applicant: Rhodia Limited
    Inventors: Stephanie Edmunds, Paul Douglas Gilbert, Robert Eric Talbot