Granted Patent
Utility
US 6,679,293 · App. 10/404,183
Pressurized bladder canister for installation of cured in place pipe
Inventor:
Franklin Driver
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: Apr 1, 2003
Inventor
Franklin Driver
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.