Granted Patent
Utility
US 4,108,347 · App. 05/771,150
One piece foam cup
Inventor:
Stephen W. Amberg
Patented Case
View Patent ↗
Granted: Aug 22, 1978
Filed: Feb 23, 1977
Inventor
Stephen W. Amberg
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.