Granted Patent
Utility
US 5,863,526 · App. 08/785,816
Homopolymers prepared from ammonium quaternary salts of aminoalkylacrylamides
Inventors:
Dominic Wai-Kwing Yeung, Stan Lem, Fred Robinson, Michael Prendergast
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Jan 10, 1997
Inventors
Dominic Wai-Kwing Yeung
Stan Lem
Fred Robinson
Michael Prendergast
Assignee (at issue)
Rhone-Poulenc, 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.