Granted Patent
Utility
US 5,984,985 · App. 07/838,642
Multiple vessel molten metal gasifier
Inventor:
Donald P. Malone
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Feb 20, 1992
Inventor
Donald P. Malone
Assignee (at issue)
Marathon Ashland Petroleum LLC
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.