Granted Patent
Utility
US 6,355,149 · App. 09/555,973
Method for producing a membrane used to operate fuel cells and electrolyzers
Inventors:
Thomas Soczka-Guth, Jochen Baurmeister, Georg Frank, Rüdiger Knauf
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Aug 14, 2000
Inventors
Thomas Soczka-Guth
Jochen Baurmeister
Georg Frank
Rüdiger Knauf
Assignee (at issue)
Celanese Ventures 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.