Granted Patent
Utility
US 4,750,913 · App. 06/943,456
Cooling of dried coal
Inventor:
Mark A. Siddoway
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Dec 19, 1986
Inventor
Mark A. Siddoway
Assignee (at issue)
Shell Mining 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.