Granted Patent
Utility
US 6,065,528 · App. 09/370,693
Air preheater cleaner
Inventors:
Kurt M. Fierle, Adam C. Sorochin
Patented Case
View Patent ↗
Granted: May 23, 2000
Filed: Aug 9, 1999
Inventors
Kurt M. Fierle
Adam C. Sorochin
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.