Granted Patent
Utility
US 5,097,564 · App. 07/578,595
Soot blower
Inventor:
Royce A. Billings
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Sep 4, 1990
Inventor
Royce A. Billings
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.