IP Library › Granted Patent US 5,801,287
Granted Patent Utility
US 5,801,287 · App. 08/814,297

Substituted diphenyldiphosphines and a process for their preparation

Inventors: Dieter Regnat, Hans-Jerg Kleiner, Helmut Bahrmann
Patented Case View Patent ↗
Granted: Sep 1, 1998 Filed: Mar 10, 1997
Inventors
Dieter Regnat
Hans-Jerg Kleiner
Helmut Bahrmann

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 5,801,287
App. No.
08/814,297
Filed
1997-03-10
Granted
1998-09-01
Kind
A