Granted Patent
Utility
US 6,450,245 · App. 10/039,959
Air preheater heat transfer elements
Inventor:
Jianrong Chen
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Oct 24, 2001
Inventor
Jianrong Chen
Assignee (at issue)
ALSTOM (Switzerland) Ltd
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.