Granted Patent
Utility
US 5,782,498 · App. 08/788,797
Sealing flange, in particular for internal lining of pipes
Inventors:
Steve Vick, Gordon Hewlett
Patented Case
View Patent ↗
Granted: Jul 21, 1998
Filed: Jan 23, 1997
Inventors
Steve Vick
Gordon Hewlett
Assignee (at issue)
Gaz de France
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.