Granted Patent
Utility
US 4,408,017 · App. 06/382,019
Coupling process
Inventor:
Michael K. Martin
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: May 26, 1982
Inventor
Michael K. Martin
Assignee (at issue)
SHELL OIL 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.