Granted Patent
Utility
US 3,979,003 · App. 05/557,083
Re-usable frangible closure
Inventor:
David O. Allen
Patented Case
View Patent ↗
Granted: Sep 7, 1976
Filed: Mar 10, 1975
Inventor
David O. Allen
Assignee (at issue)
Buckeye Molding Company
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.