Granted Patent
Utility
US 4,317,916 · App. 06/183,871
Process for producing N-substituted-N-acetyl-2,6-dialkyl-anilines
Inventors:
Gerhard Degischer, Werner Angst
Patented Case
View Patent ↗
Granted: Mar 2, 1982
Filed: Sep 4, 1980
Inventors
Gerhard Degischer
Werner Angst
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.