Granted Patent
Utility
US 4,343,627 · App. 06/210,899
Method of operating a two-stage coal gasifier
Inventor:
Michael C. Tanca
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Nov 28, 1980
Inventor
Michael C. Tanca
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.