Granted Patent
Utility
US 4,340,009 · App. 06/188,196
Means for protecting underground tanks from damage by dipsticks
Inventor:
Gerald G. Greaves
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Sep 18, 1980
Inventor
Gerald G. Greaves
Assignee (at issue)
Owens-Corning Fiberglas 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.