Granted Patent
Utility
US 4,735,262 · App. 07/017,329
Rotary steam joint
Inventor:
JAMES LUCAS
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Feb 20, 1987
Inventor
JAMES LUCAS
Assignee (at issue)
Duff-Norton 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.