Granted Patent
Utility
US 4,810,596 · App. 06/788,999
Sulfuric acid thermoelectrochemical system and method
Inventor:
Frank A. Ludwig
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 18, 1985
Inventor
Frank A. Ludwig
Assignee (at issue)
Hughes Aircraft 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.