Patents by Inventor Thomas S. Wallsten

Thomas S. Wallsten 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).

  • Patent number: 4160535
    Abstract: A collapsible holder for a conically shaped food filter element includes an upper large flat annulus formed of plastic and provided with opposite outwardly directed wings provided with inner medial apertures. A lower small flat annulus is provided with opposite elongated side arms delineated therefrom by fold lines, which arms slideably engage respective wing apertures and terminate in enlarged heads wider than the apertures. In the holder operable condition, the smaller annulus is coaxial with and below the larger annulus and suspended therefrom by the extended side arms and in its collapsed condition the annuli are at about the same level with one of the side arms being pulled through the wing aperture and overlying the other flattened side arm.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: July 10, 1979
    Assignee: Berkshire Paper Company
    Inventor: Thomas S. Wallsten