Granted Patent
Utility
US 6,773,471 · App. 10/209,089
Low sulfur coal additive for improved furnace operation
Inventors:
Stephen Allen Johnson, John Wurster, John Philip Comer
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jul 30, 2002
Inventors
Stephen Allen Johnson
John Wurster
John Philip Comer
Assignee (at issue)
ADA Environmental Solutions, LLC
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.