Granted Patent
Utility
US 4,863,365 · App. 07/077,883
Method and apparatus for deforming reformable tubular pipe liners
Inventors:
Patrick R. Ledoux, Luc R. Fourgaut
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jul 27, 1987
Inventors
Patrick R. Ledoux
Luc R. Fourgaut
Assignee (at issue)
Pipe Liners, Inc.
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.