IP Library Granted Patent US 4,522,840
Granted Patent Utility
US 4,522,840 · App. 06/499,400

Manufacture of highlighted intagliated articles

Inventors: Brian L. Corfield, Raymond C. Rowe
Patented Case View Patent ↗
Granted: Jun 11, 1985 Filed: May 31, 1983
Inventors
Brian L. Corfield
Raymond C. Rowe
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 4,522,840
App. No.
06/499,400
Filed
1983-05-31
Granted
1985-06-11
Kind
A