Granted Patent
Utility
US 4,229,854 · App. 05/949,089
Soot blower construction
Inventor:
Jesse Johnston
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Oct 6, 1978
Inventor
Jesse Johnston
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.