Granted Patent
Utility
US 4,888,396 · App. 07/203,835
Novel cationic acrylamide polymers and processes for their preparation
Inventors:
Herbert K. Reimschuessel, William Chiang, George J. W. Tichenor
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jun 8, 1988
Inventors
Herbert K. Reimschuessel
William Chiang
George J. W. Tichenor
Assignee (at issue)
Polypure, 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.