Granted Patent
Utility
US 5,103,993 · App. 07/579,708
Container lid having non-perpendicular reinforcement ribs
Inventor:
Josef Bingisser
Patented Case
View Patent ↗
Granted: Apr 14, 1992
Filed: Sep 10, 1990
Inventor
Josef Bingisser
Assignee (at issue)
Ropak Corporation
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.