Granted Patent
Utility
US 4,936,047 · App. 07/186,659
Method of capturing sulfur in coal during combustion and gasification
Inventors:
Herman Feldmann, Byung Chan Kim
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Apr 20, 1988
Inventors
Herman Feldmann
Byung Chan Kim
Assignee (at issue)
Battelle Development 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.