Granted Patent
Utility
US 4,642,398 · App. 06/816,481
Preparation of fluoronitrobenzene compounds in dispersion of potassium fluoride
Inventor:
Gary L. Cantrell
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Jan 6, 1986
Inventor
Gary L. Cantrell
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.