Patents by Inventor Fredrick B. Pippert

Fredrick B. Pippert 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).

  • Pump liner
    Patent number: 6463843
    Abstract: A pump liner comprising a tubular sleeve having an inner sleeve surface formed of a corrosion- and abrasion-resistant material and an outer, frustoconical sleeve surface and a shell having an outer shell surface and an inner, frustoconical shell surface, the inner shell surface preferably being in interference engagement with the outer sleeve surface.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: October 15, 2002
    Inventor: Fredrick B. Pippert