Patents by Inventor Oakley Campbell

Oakley Campbell 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).

  • Apparatus and method for collection and transfer of a liquid
    Patent number: 5921262
    Abstract: There is provided an apparatus and method for the collection and transfer of a liquid, which is preferably waste oil. The apparatus includes a tank having a top opening with a hollow tube projecting from the top opening into the interior of the tank. A hollow stem is slidably received within the hollow tube. A funnel, which initially receives the liquid, is attached to the top end of the stem which is located outside of the tank. An opening is provided in the wall of the stem near the lower end which is located inside the tank. A cover plate is received about the bottom of the stem.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: July 13, 1999
    Assignee: Balcrank Products, Inc.
    Inventor: Oakley Campbell