Granted Patent
Utility
US 4,410,404 · App. 06/277,906
Membrane cell at increased caustic concentration
Inventors:
Craig S. Warburton, Stanley K. Baczek
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Jun 26, 1981
Inventors
Craig S. Warburton
Stanley K. Baczek
Assignee (at issue)
Diamond Shamrock Corporation
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.