Granted Patent
Utility
US 4,469,875 · App. 06/426,132
Optically active proline derivative, process for its production and use
Inventors:
Eberhard Busker, Jurgen Martens, Regina Steigerwald, Horst Weigel
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Sep 28, 1982
Inventors
Eberhard Busker
Jurgen Martens
Regina Steigerwald
Horst Weigel
Assignee (at issue)
Degussa AG
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.