Granted Patent
Utility
US 4,495,367 · App. 06/563,012
High charge density, cationic methacrylamide based monomers and their _polymers
Inventor:
Laurence G. Dammann
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Dec 19, 1983
Inventor
Laurence G. Dammann
Assignee (at issue)
Celanese GmbH
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.