Granted Patent
Utility
US 5,612,149 · App. 08/581,989
Fuel cell column heat exchanger mated module
Inventors:
Joseph J. Hartvigsen, Ashok C. Khandkar, Singaravelu Elangovan
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Jan 2, 1996
Inventors
Joseph J. Hartvigsen
Ashok C. Khandkar
Singaravelu Elangovan
Assignee (at issue)
Ceramatec, 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.