IP Library Granted Patent US 4,764,178
Granted Patent Utility
US 4,764,178 · App. 06/896,000

Thermal transfer printing: hetero-aromatic azo dye

Inventors: Peter Gregory, Raymond L. White
Patented Case View Patent ↗
Granted: Aug 16, 1988 Filed: Aug 13, 1986
Inventors
Peter Gregory
Raymond L. White
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 4,764,178
App. No.
06/896,000
Filed
1986-08-13
Granted
1988-08-16
Kind
A