Granted Patent
Utility
US 5,718,944 · App. 08/777,247
Corrosion protection in concrete sanitary sewers
Inventor:
Thomas M. Miller
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Dec 31, 1996
Inventor
Thomas M. Miller
Assignee (at issue)
PSC Technologies GmbH
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.