Granted Patent
Utility
US 4,264,529 · App. 06/133,084
Method for preparing p-aminophenol
Inventor:
Thomas J. Dunn
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Mar 24, 1980
Inventor
Thomas J. Dunn
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.