Granted Patent
Utility
US 4,197,948 · App. 05/683,746
Nestable foam cup
Inventors:
Stephen W. Amberg, Thomas E. Doherty
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: May 6, 1976
Inventors
Stephen W. Amberg
Thomas E. Doherty
Assignee (at issue)
Owens-Illinois Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.