Patents by Inventor Richard A. Felber

Richard A. Felber 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).

  • Filter cartridge with drainable sludge barrier
    Patent number: 6063276
    Abstract: This invention relates generally to filters for removing impurities from liquids, and more particularly to a replaceable filter cartridge having a barrier for preventing contaminants from draining from a spent cartridge, as it is being replaced. The barrier comprises a layer of filter media closely surrounding an inner perforated conducting conduit.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: May 16, 2000
    Assignee: North American Filter Corporation
    Inventor: Richard A Felber
  • Filter cartridge with drainable sludge barrier
    Patent number: 5811002
    Abstract: This invention relates generally to filters for removing impurities from liquids, and more particularly to a replaceable filter cartridge having a barrier for preventing contaminants from draining from a spent cartridge, as it is being replaced. The barrier comprises a layer of filter media closely surrounding an inner perforated conducting conduit.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: September 22, 1998
    Assignee: North American Filter Corporation
    Inventor: Richard A. Felber