Granted Patent
Utility
US 4,487,325 · App. 06/395,396
Crown closures and containers
Inventor:
Wendell D. Willingham
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Jul 6, 1982
Inventor
Wendell D. Willingham
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.