IP Library Granted Patent US 4,847,367
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,847,367
App. No.
07/120,441
Filed
1987-11-13
Granted
1989-07-11
Kind
A