Granted Patent
Utility
US 5,778,830 · App. 08/775,931
Closed frame sootblower with top access
Inventor:
H. Davis Wall
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Jan 2, 1997
Inventor
H. Davis Wall
Assignee (at issue)
Combustion Engineering, 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.