Granted Patent
Utility
US 4,990,699 · App. 07/258,650
Perfluoroalkylation process
Inventor:
G. Patrick Stahly
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Oct 17, 1988
Inventor
G. Patrick Stahly
Assignee (at issue)
Ethyl Corporation
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.