Granted Patent
Utility
US 5,955,039 · App. 08/775,702
Coal gasification and hydrogen production system and method
Inventor:
Thomas Dowdy
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Dec 19, 1996
Inventor
Thomas Dowdy
Assignee (at issue)
Siemens Westinghouse Power 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.