Granted Patent
Utility
US 4,889,951 · App. 07/185,399
Perfluoroalkylation process
Inventor:
Robert I. Davidson
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Apr 25, 1988
Inventor
Robert I. Davidson
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.