Granted Patent
Utility
US 4,836,409 · App. 07/156,974
Integral diaphragm-liner bladder for hydropneumatic tank
Inventor:
Joseph A. Lane
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Feb 18, 1988
Inventor
Joseph A. Lane
Assignee (at issue)
Amtrol, 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.