Granted Patent
Utility
US 6,068,045 · App. 09/383,464
Rotor construction for air preheater
Inventors:
Kurt M. Fierle, Kevin J. O'Boyle
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Aug 26, 1999
Inventors
Kurt M. Fierle
Kevin J. O'Boyle
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.