Granted Patent
Utility
US 6,334,484 · App. 09/294,896
Multi-pass heat exchanger
Inventor:
Heinz-Georg Kandel
Patented Case
View Patent ↗
Granted: Jan 1, 2002
Filed: Apr 20, 1999
Inventor
Heinz-Georg Kandel
Assignee (at issue)
Aventis Behring GmbH
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.