Granted Patent
Utility
US 4,284,481 · App. 06/143,458
Method of fabricating a metallic hermetic sealing cover for a container
Inventor:
Norman Hascoe
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Apr 24, 1980
Inventor
Norman Hascoe
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.