Granted Patent
Utility
US 4,703,065 · App. 06/011,654
Foam cups with enhanced coffee retention
Inventor:
Fred Sonnenberg
Patented Case
View Patent ↗
Granted: Oct 27, 1987
Filed: Feb 5, 1987
Inventor
Fred Sonnenberg
Assignee (at issue)
Atlantic Richfield Company
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.