Granted Patent
Utility
US 4,293,394 · App. 06/135,960
Electrolytically producing chlorine using a solid polymer electrolyte-cathode unit
Inventors:
William B. Darlington, Donald W. DuBois, Preston S. White
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Mar 31, 1980
Inventors
William B. Darlington
Donald W. DuBois
Preston S. White
Assignee (at issue)
PPG Industries, Inc.
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.