Granted Patent
Utility
US 4,220,262 · App. 06/068,037
Safety closure
Inventors:
Albert R. Uhlig, Thomas J. Krall
Patented Case
View Patent ↗
Granted: Sep 2, 1980
Filed: Aug 20, 1979
Inventors
Albert R. Uhlig
Thomas J. Krall
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.