Granted Patent
Utility
US 5,358,688 · App. 08/152,888
Antimicrobial quaternary ammonium group-containing polymers, compositions thereof, and monomers used to produce said polymers
Inventor:
J. Richard Robertson
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Nov 16, 1993
Inventor
J. Richard Robertson
Assignee (at issue)
Ciba-Geigy
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.