Granted Patent
Utility
US 4,492,187 · App. 06/558,380
Sootblower apparatus
Inventor:
Charles W. Hammond
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Dec 5, 1983
Inventor
Charles W. Hammond
Assignee (at issue)
The Babcock & Wilcox Company
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.