Patents by Inventor Robert E. Stamstad

Robert E. Stamstad 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).

  • Unitary injection molded filter
    Patent number: 4882055
    Abstract: A unitary injection molded filter is disclosed which includes a rigid frame of resin material to provide a rigid shape to the filter, and at least one screen of non-woven sheet resin material suspended on the frame and having formed therethrough a plurality of holes extending between the opposed side surfaces of the screen so as to form fluid passages therethrough. Each screen is integrally molded simultaneously with the frame.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: November 21, 1989
    Assignee: Suratco Products Company
    Inventor: Robert E. Stamstad