Granted Patent
Utility
US 4,948,919 · App. 07/304,596
Arylaminonitrophenyl hydroxyethyl sulfones
Inventors:
Werner Brodt, Theodor Papenfuhs
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Jan 24, 1989
Inventors
Werner Brodt
Theodor Papenfuhs
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.