Granted Patent
Utility
US 4,510,021 · App. 06/245,874
Fluidized bed charcoal particle production system
Inventor:
Norman K. Sowards
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Mar 23, 1981
Inventor
Norman K. Sowards
Assignee (at issue)
Energy Products of Idaho
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.