Granted Patent
Utility
US 4,738,764 · App. 06/869,555
Electrodialysis membranes comprising sulfonated constituents
Inventors:
Frederick P. Chlanda, Robert S. Cooke
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Jun 2, 1986
Inventors
Frederick P. Chlanda
Robert S. Cooke
Assignee (at issue)
ALLIED CONSULTING, 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.