Granted Patent
Utility
US 4,589,964 · App. 06/580,119
Process for graft copolymerization of a pre-formed substrate
Inventors:
Kenneth G. Mayhan, Robert Allen Janssen, William Jeffrey Bertrand
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Feb 14, 1984
Inventors
Kenneth G. Mayhan
Robert Allen Janssen
William Jeffrey Bertrand
Assignee (at issue)
American Hospital Supply Corp.
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.