Granted Patent
Utility
US 6,093,363 · App. 08/959,525
Method of lining pipelines with flow-through apparatus and liner
Inventor:
Richard C. Polivka
Patented Case
View Patent ↗
Granted: Jul 25, 2000
Filed: Oct 28, 1997
Inventor
Richard C. Polivka
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.