Granted Patent
Utility
US 4,553,759 · App. 06/680,185
Valve and improved stem seal therefor
Inventor:
James E. Kilmoyer
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Dec 10, 1984
Inventor
James E. Kilmoyer
Assignee (at issue)
Cameron Iron Works, Inc.
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.