Granted Patent
Utility
US 5,447,702 · App. 08/206,569
Fluid bed desulfurization
Inventors:
William M. Campbell, Gunnar Henningsen
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Mar 4, 1994
Inventors
William M. Campbell
Gunnar Henningsen
Assignee (at issue)
The M.W. Kellogg Company
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.