Patents by Inventor Peter J. Hoyle

Peter J. Hoyle 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).

  • Dewatering compositions and processes
    Patent number: 5213693
    Abstract: Sewage sludge and other organic suspensions are prepared for filter press or belt press dewatering by substantially simultaneous treatment with a cationic coagulant polymer and a cationic flocculant polymer. A novel composition comprising a dry blend of the two polymers can then be formed to provide a combined solution for mixing with the suspension.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Allied Colloids Limited
    Inventors: George McGrow, Peter I. Norman, Peter J. Hoyle