Granted Patent
Utility
US 4,397,597 · App. 06/200,909
Method for threading closures
Inventor:
Roderick V. King
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Oct 27, 1980
Inventor
Roderick V. King
Assignee (at issue)
Ethyl Products 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.