Granted Patent
Utility
US 4,706,873 · App. 06/392,176
Disposable cup with sidewall pop-out
Inventor:
Werner Schulz
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jun 25, 1982
Inventor
Werner Schulz
Assignee (at issue)
James River-Norwalk
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.