Granted Patent
Utility
US 4,544,373 · App. 06/130,793
2,4-Dinitro-2'-acylamino-4'-dialkylamino-5'-alkoxy-alkyleneoxy-1, 1'-azobezene dyes
Inventors:
Angelo Della Casa, Peter Aeschlimann
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Mar 17, 1980
Inventors
Angelo Della Casa
Peter Aeschlimann
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.