Granted Patent
Utility
US 4,386,712 · App. 06/280,753
Safety closure with liner
Inventor:
Robert C. DeWallace
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Jul 6, 1981
Inventor
Robert C. DeWallace
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.