Granted Patent
Utility
US 4,243,729 · App. 05/929,836
Metallic hermetic sealing cover for a container
Inventor:
Norman Hascoe
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Jul 31, 1978
Inventor
Norman Hascoe
Assignee (at issue)
Semi-Alloys 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.