Granted Patent
Utility
US 5,624,629 · App. 08/394,622
Installation of lateral linings with sealing collar from the main pipeline out
Inventor:
Eric Wood
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Feb 27, 1995
Inventor
Eric Wood
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.