Granted Patent
Utility
US 4,777,984 · App. 07/013,034
Method for lining a pipe or main
Inventor:
Brian Walter Storah, deceased
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Feb 10, 1987
Inventor
Brian Walter Storah, deceased
Assignee (at issue)
BRITISH GAS PLC
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.