Granted Patent
Utility
US 4,402,806 · App. 06/354,854
Multi layer ion exchanging membrane with protected interior hydroxyl ion rejection layer
Inventors:
Thomas G. Coker, Anthony B. LaConti, Edward N. Balko
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Mar 4, 1982
Inventors
Thomas G. Coker
Anthony B. LaConti
Edward N. Balko
Assignee (at issue)
General Electric 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.