Granted Patent
Utility
US 4,256,669 · App. 05/959,024
Para-aminophenol derivatives
Inventors:
Roland G. Benner, Paul D. Henson
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Nov 8, 1978
Inventors
Roland G. Benner
Paul D. Henson
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.