Granted Patent
Utility
US 6,612,340 · App. 09/608,912
Turnback protection for installation of cured in place liners
Inventor:
John Patrick Lause
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Jun 30, 2000
Inventor
John Patrick Lause
Assignee (at issue)
Insituform (Netherlands) B.V.
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.