Granted Patent
Utility
US 5,968,320 · App. 08/797,787
Non-recovery coke oven gas combustion system
Inventor:
Hugh H. Sprague
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Feb 7, 1997
Inventor
Hugh H. Sprague
Assignee (at issue)
Stelco 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.