Granted Patent
Utility
US 4,834,859 · App. 07/180,508
Diaphragm cell cathode assembly
Inventors:
Richard L. Romine, L. Calvert Curlin
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Apr 12, 1988
Inventors
Richard L. Romine
L. Calvert Curlin
Assignee (at issue)
OxyTech Systems, 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.