Granted Patent
Utility
US 4,722,956 · App. 06/938,941
Stabilized block copolymer compositions containing ring-substituted N-acyl-para-aminophenol
Inventor:
Neil Dunski
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Dec 8, 1986
Inventor
Neil Dunski
Assignee (at issue)
MALLINCKRODT LLC
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.