Granted Patent
Utility
US 4,783,547 · App. 06/853,448
Polyfluoroaromatic nitriles
Inventors:
Ludwig Hartmann, John F. Stephen
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: Apr 18, 1986
Inventors
Ludwig Hartmann
John F. Stephen
Assignee (at issue)
ICI Americas, Inc.
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.