Granted Patent
Utility
US 4,356,121 · App. 06/305,662
Process for the production of N-cyanolactams
Inventors:
Dieter Trachsler, Friedrich Lohse
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Sep 25, 1981
Inventors
Dieter Trachsler
Friedrich Lohse
Assignee (at issue)
Ciba-Geigy
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.