Granted Patent
Utility
US 5,899,261 · App. 08/929,037
Air preheater heat transfer surface
Inventors:
Tadek Casimir Brzytwa, Wayne S. Counterman, James D. Seebald
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Sep 15, 1997
Inventors
Tadek Casimir Brzytwa
Wayne S. Counterman
James D. Seebald
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.