IP Library › Granted Patent US 4,965,270
Granted Patent Utility
US 4,965,270 · App. 07/433,011

Purine derivatives

Inventors: Michael R. Harnden, Paul Graham Wyatt, Stuart Bailey
Patented Case View Patent ↗
Granted: Oct 23, 1990 Filed: Nov 7, 1989
Inventors
Michael R. Harnden
Paul Graham Wyatt
Stuart Bailey
Assignee (at issue)
Beecham Group plc

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 4,965,270
App. No.
07/433,011
Filed
1989-11-07
Granted
1990-10-23
Kind
A