Granted Patent
Utility
US 6,581,676 · App. 09/974,508
Rotor design with double seals for vertical air preheaters
Inventors:
Kurt M. Fierle, Lawrence J. Muscato
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Oct 10, 2001
Inventors
Kurt M. Fierle
Lawrence J. Muscato
Assignee (at issue)
ABB Alstom Power N.V.
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.