Granted Patent
Utility
US 4,847,367 · App. 07/120,441
4-higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumyl)-azobenzenes
Inventors:
Raymond Seltzer, Roland A. E. Winter
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Nov 13, 1987
Inventors
Raymond Seltzer
Roland A. E. Winter
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.