Granted Patent
Utility
US 5,227,545 · App. 07/958,287
Process for the preparation of 2,4-dichlorofluorobenzene
Inventors:
Theodor Papenfuhs, Georg Folz, Ralf Pfirmann
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Oct 8, 1992
Inventors
Theodor Papenfuhs
Georg Folz
Ralf Pfirmann
Assignee (at issue)
Hoechst GmbH
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.