Granted Patent
Utility
US 5,363,836 · App. 08/112,702
Furnace with supplementary heat exchange means
Inventor:
Eugene C. Briggs
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Aug 26, 1993
Inventor
Eugene C. Briggs
Assignee (at issue)
Black Gold Corporation
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.