Patents by Inventor Robert B. Sprague

Robert B. Sprague 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).

  • Reverse-osmosis water purifier apparatus and method
    Patent number: 4391712
    Abstract: An apparatus and method whereby after a reverse-osmosis water purifier system has been shut down, the first quantity of water, which emanates from the reverse-osmosis filter, does not flow through the pure water storage tank but instead to the drain. Therefore, the water in the reverse-osmosis filter, and which has become contaminated as the result of standing in the filter so that a substantial amount of osmosis can occur, does not contaminate the pure water in the storage tank or system but instead is discarded.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: July 5, 1983
    Assignees: Richard W. Beall, Jr., Louis J. Favara, Richard L. Gausewitz, Richard F. Carr, Allan Rothenberg, Elgin Edwards
    Inventors: Truman V. Tyler, Robert B. Sprague