Granted Patent
Utility
US 4,288,293 · App. 06/140,392
Form coke production with recovery of medium BTU gas
Inventor:
Erik Saller
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Apr 14, 1980
Inventor
Erik Saller
Assignee (at issue)
FMC 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.