Granted Patent
Utility
US 4,496,173 · App. 06/493,422
Threaded coupling
Inventors:
Joseph R. Roche, Charles D. Morrill, Joseph H. Hynes
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: May 10, 1983
Inventors
Joseph R. Roche
Charles D. Morrill
Joseph H. Hynes
Assignee (at issue)
Hydril 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.