Granted Patent
Utility
US 5,318,671 · App. 07/878,904
Method of operation of nonrecovery coke oven battery
Inventor:
Charles W. Pruitt
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: May 6, 1992
Inventor
Charles W. Pruitt
Assignee (at issue)
Sun Coal Company
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.