Granted Patent
Utility
US 5,481,032 · App. 08/159,087
Process for the preparation of halogenated benzoic acids
Inventor:
Ralf Pfirmann
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Nov 29, 1993
Inventor
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.