Granted Patent
Utility
US 4,866,185 · App. 07/223,464
Difunctional polyfluoroaromatic derivatives and a process of preparing the same
Inventors:
Ludwig Hartmann, John F. Stephen
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Sep 6, 1988
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.