Granted Patent
Utility
US 4,599,955 · App. 06/777,860
Coal slagging burner for producing clean low-sulfur fuel gas
Inventors:
Malcolm T. Hepworth, Gordon R. Wicker
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Sep 18, 1985
Inventors
Malcolm T. Hepworth
Gordon R. Wicker
Assignee (at issue)
AMAX INCORPORATED
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.