Patents by Inventor Daniel F. Spengler

Daniel F. Spengler 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).

  • Ice cream carton
    Patent number: 4801080
    Abstract: An ice cream carton is made as a perfect cube with six smooth, unbroken, external surfaces by forming aligned embossments and windows to facilitate adhesion of the carton walls without impairing the external unbroken smooth continuity.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: January 31, 1989
    Assignee: Deutchcube, Inc.
    Inventor: Daniel F. Spengler