Granted Patent
Utility
US 5,606,997 · App. 08/430,330
Method for rehabilitating pipe line and resin impregnated lining having an integral heating element
Inventors:
Richard Blackmore, Mark Sloan
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Apr 28, 1995
Inventors
Richard Blackmore
Mark Sloan
Assignee (at issue)
Advance Trenchless Rehabilitation Systems
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.