IP Library › Granted Patent US 4,177,253
Granted Patent Utility
US 4,177,253 · App. 05/813,422

Magnetic particles for immunoassay

Inventors: George E. Davies, Jiri Janata
Patented Case View Patent ↗
Granted: Dec 4, 1979 Filed: Jul 6, 1977
Inventors
George E. Davies
Jiri Janata
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 4,177,253
App. No.
05/813,422
Filed
1977-07-06
Granted
1979-12-04
Kind
A