Granted Patent
Utility
US 5,816,283 · App. 08/831,081
Tank blanketing system
Inventor:
Paul R. Ostand
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Apr 1, 1997
Inventor
Paul R. Ostand
Assignee (at issue)
Appalachian Controls Environmental
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.