Granted Patent
Utility
US 4,459,318 · App. 06/501,966
Method for forming a self-lubricating fill tube
Inventor:
Thomas E. Hyans
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Jun 10, 1983
Inventor
Thomas E. Hyans
Assignee (at issue)
American Hospital Supply Corp.
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.