Granted Patent
Utility
US 4,498,213 · App. 06/590,290
Soot blower
Inventor:
Gerald F. Zalewski
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Mar 16, 1984
Inventor
Gerald F. Zalewski
Assignee (at issue)
White Consolidated Industries, 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.