Granted Patent
Utility
US 6,562,503 · App. 10/146,606
Freeze tolerant fuel cell power plant
Inventors:
Albert P. Grasso, David A. Condit
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: May 15, 2002
Inventors
Albert P. Grasso
David A. Condit
Assignee (at issue)
UTC Fuel Cells, LLC
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.