Granted Patent
Utility
US 4,822,894 · App. 07/023,277
Optically active bicyclic imino-alpha-carboxylic esters
Inventors:
Rolf Geiger, Volker Teetz, Dietrich Langner, Hansjorg Urbach, Rainer Henning
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Mar 9, 1987
Inventors
Rolf Geiger
Volker Teetz
Dietrich Langner
Hansjorg Urbach
Rainer Henning
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.