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:
Aug. 28, 1990
Filed:
Sep. 12, 1989
Applicant:
Inventors:
Sylvain Juge, Puteaux, FR;
Yvonne Legras, Paris, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
558 83 ;
Abstract
New cyclic phosphonites, in which one of the oxygen atoms of the ring can be replaced by an atom of sulphur or nitrogen; the molecule has an asymmetry due to at least two carbon atoms, one or more nitrogen and/or oxygen atoms or several of these elements together. Preparation of these phosphonites by the reaction of a dihalogeno-phosphine with a compound having two active H atoms, in the presence of a hydracid acceptor. Application of the new phosphonites to the production of the corresponding phosphinates and phosphine oxides.