Granted Patent
Utility
US 4,422,979 · App. 06/369,339
Fluoro-substituted biphenylyl compounds and processes
Inventors:
Edward J. Zaiko, Paul F. Ranken
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Apr 16, 1982
Inventors
Edward J. Zaiko
Paul F. Ranken
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.