Granted Patent
Utility
US 4,389,767 · App. 06/214,847
Method of manufacturing pulverizer rolls
Inventor:
Henry E. Burbach
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Dec 10, 1980
Inventor
Henry E. Burbach
Assignee (at issue)
Combustion Engineering, Inc.
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.