Patents by Inventor R. Pat Grogen

R. Pat Grogen 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).

  • Precompression pump sprayer
    Patent number: 5560520
    Abstract: A precompression pump sprayer has a sliding discharge valve/secondary piston member in sliding telescoping engagement with an inlet conduit extending into a secondary portion of the pump cylinder forming therewith an annular chamber housing the piston return spring, the annular chamber having a vent/drain port opening directly into the container, and the member being cup-shaped and having openings sized to facilitate discharge valve opening and closing.
    Type: Grant
    Filed: August 7, 1995
    Date of Patent: October 1, 1996
    Assignee: Calmar Inc.
    Inventor: R. Pat Grogen