The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2003
Filed:
Nov. 09, 2001
Applicant:
Inventors:
Jean-Philippe Gillet, Brignais, FR;
Olivier Guerret, Marcy l'Etoile, FR;
Paul Tordo, Marseilles, FR;
Assignee:
Atofina, Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/02 ;
U.S. Cl.
CPC ...
C07F 9/02 ;
Abstract
The invention concerns a method for preparing &bgr;-phosphorous nitroxide radicals which comprises preparing in a first step an aminophosphonate by reacting a carbonyl compound, a primary amine and a phosphorous compound, then in a second step in oxidizing said aminophosphonate using on-halogenated organic peracids in a two-phase organic water/solvent medium with a buffered aqueous phase with a pH ranging between 5 and 12.