Patents by Inventor Marshall E. Roberts

Marshall E. Roberts 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: 3961732
    Abstract: A flexible sheet-type member is removably accommodated in the trough of the upper rim of a container. The member guides the liquid poured from the container out of the container bypassing the trough and thereby preventing the liquid from entering the trough and from spilling on the outside of the container.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: June 8, 1976
    Inventor: Marshall E. Roberts