Patents by Inventor Warren Stubblebine

Warren Stubblebine 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).

  • Two-stage filter apparatus
    Patent number: 4787972
    Abstract: A two-stage filter apparatus for removing particles entrained in a liquid wherein the liquid is initially presented to the first filter stage having an endless filter belt for removal of a portion of the entrained particles to result in a liquid having a decreased density of particles. This resulting liquid of decreased density is then presented to a cyclone filter in the second filter stage and divided into two parts, one part which is substantially free of any particles which is then available for its intended use and a second part that is presented to another endless filter belt and returned serially to the first filter and then the second filter stages for subsequent filtering of particles.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: November 29, 1988
    Assignee: Stein Associates, Inc.
    Inventor: Warren Stubblebine