Granted Patent
Utility
US 5,288,168 · App. 07/934,868
Method and apparatus for lining outdoor fluid containment areas to facilitate electrical leak detection
Inventor:
John Spencer
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Aug 24, 1992
Inventor
John Spencer
Assignee (at issue)
Gundle Lining Construction Corporation
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.