IP Library › Granted Patent US 5,197,992
Granted Patent Utility
US 5,197,992 · App. 07/648,517

Reactive dyes

Inventors: John A. Taylor, Duncan Adrian Sidney Phillips, Chu K. Yung, Gerard Ellis
Patented Case View Patent ↗
Granted: Mar 30, 1993 Filed: Jan 30, 1991
Inventors
John A. Taylor
Duncan Adrian Sidney Phillips
Chu K. Yung
Gerard Ellis
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED

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 5,197,992
App. No.
07/648,517
Filed
1991-01-30
Granted
1993-03-30
Kind
A