Granted Patent
Utility
US 6,401,667 · App. 09/572,308
Method and plant for heating a liquid medium
Inventor:
Erhard Liebig
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: May 18, 2000
Inventor
Erhard Liebig
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.