Granted Patent
Utility
US 5,451,698 · App. 08/264,720
Process for the preparation of sulfonated arylphosphines
Inventors:
Helmut Bahrmann, Peter Lappe, Wolfgang Anton Herrmann, Rainer Manetsberger, Guido Albanese, Klaus Bergrath
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Jun 23, 1994
Inventors
Helmut Bahrmann
Peter Lappe
Wolfgang Anton Herrmann
Rainer Manetsberger
Guido Albanese
Klaus Bergrath
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.