Granted Patent
Utility
US 6,468,684 · App. 09/439,377
Proton conducting membrane using a solid acid
Inventors:
Calum Chisholm, Sekharipuram R. Narayanan, Dane Andrew Boysen, Sossina M. Haile
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Nov 15, 1999
Inventors
Calum Chisholm
Sekharipuram R. Narayanan
Dane Andrew Boysen
Sossina M. Haile
Assignee (at issue)
California Institute of Technology
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.