IP Library › Granted Patent US 4,933,478
Granted Patent Utility
US 4,933,478 · App. 07/239,233

Process for the manufacture of aliphatylphosphinic acid derivatives

Inventors: Peter S. Wardleworth, Eric K. Baylis
Patented Case View Patent ↗
Granted: Jun 12, 1990 Filed: Sep 1, 1988
Inventors
Peter S. Wardleworth
Eric K. Baylis
Assignee (at issue)
Ciba-Geigy

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 4,933,478
App. No.
07/239,233
Filed
1988-09-01
Granted
1990-06-12
Kind
A