Granted Patent
Utility
US 4,898,824 · App. 06/939,904
Crosslinked polyacrylamide-sulfhydryl polymer for immobilization of biologically active substances
Inventor:
Kin F. Yip
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Dec 9, 1986
Inventor
Kin F. Yip
Assignee (at issue)
Miles 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.