Patents by Inventor Frederick P. Marshall

Frederick P. Marshall 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).

  • Closure having means for retention in tubular container
    Patent number: 4504009
    Abstract: This relates to a closure unit which may be inserted into an open end of a tubular container body, particularly one formed of paperboard or plastic material, and which will have an automatic interlock with the container body and a seal sufficient to hold the closure unit in sealed relation with respect to the container body under all normal usages without the use of adhesive. The interlock between the closure unit and the container body is in the form of a plurality of retaining lugs which are resiliently deflected when the closure unit and container body are assembled and which have a pressure engagement with the interior surface of the container body to form an interlock therewith.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: March 12, 1985
    Assignee: The Continental Group, Inc.
    Inventors: Elmer J. Boik, Frederick P. Marshall