Granted Patent
Utility
US 6,702,338 · App. 10/141,365
Flue gas conduit joining connection
Inventor:
David C. Vanasse
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: May 9, 2002
Inventor
David C. Vanasse
Assignee (at issue)
Heat-Fab, 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.