Granted Patent
Utility
US 4,983,699 · App. 07/292,859
Silylated addition polymers with pendant ionic moieties
Inventors:
David E. Dana, Ernest L. Lawton, George L. Brodmann
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Jan 3, 1989
Inventors
David E. Dana
Ernest L. Lawton
George L. Brodmann
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.