Granted Patent
Utility
US 4,734,028 · App. 06/909,881
Adapter for converting an oil burner head for burning of pulverized coal
Inventor:
Joseph E. Musil
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Sep 22, 1986
Inventor
Joseph E. Musil
Assignee (at issue)
Cedarapids, 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.