Granted Patent
Utility
US 4,927,980 · App. 07/146,259
Catalytic method for producing fluoroaromatic compounds using branched alkyl pyridinium salts
Inventor:
Gary L. Cantrell
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Feb 9, 1987
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.