Granted Patent
Utility
US 6,164,960 · App. 09/467,909
Flue seal for a carbon anode baking furnace
Inventor:
Donald B. Gibson
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Dec 21, 1999
Inventor
Donald B. Gibson
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.