Granted Patent
Utility
US 5,626,184 · App. 08/518,797
Sootblower
Inventors:
Barry E. Campbell, Harlan E. Finnemore
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Aug 24, 1995
Inventors
Barry E. Campbell
Harlan E. Finnemore
Assignee (at issue)
ABB Air Preheater 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.