Granted Patent
Utility
US 6,686,077 · App. 09/989,540
Liquid hetero-interface fuel cell device
Inventors:
Robert R. Rice, Jan Vetrovec
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Nov 21, 2001
Inventors
Robert R. Rice
Jan Vetrovec
Assignee (at issue)
The Boeing Company
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.