Granted Patent
Utility
US 5,620,487 · App. 08/336,440
High performance, multi-stage, pressurized, airblown, entrained flow coal gasifier system
Inventor:
Herbert E. Andrus, Jr.
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Nov 9, 1994
Inventor
Herbert E. Andrus, Jr.
Assignee (at issue)
Combustion Engineering, Inc.
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.