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:
May. 17, 1977
Filed:
Jun. 25, 1975
Applicant:
Inventors:
Jean-Marie J Biehler, Brunstatt, FR;
Serge L Lecolier, Janville sur Juine, FR;
Patrice M Le Roy, Ballancourt, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
260932 ; 260 / ; 260971 ;
Abstract
Novel diesters of diethyl hydroxymethylphosphonate of the formula: ##STR1## in which R.sub.1 and R.sub.4 are alkylene radicals --(CH.sub.2).sub.m -- in which m is 0 or an integer, R.sub.2 and R.sub.3 are H or alkyl radicals, the total number of carbon atoms in R.sub.1, R.sub.2, R.sub.3 and R.sub.4 being not more than 10, are described. These diesters are valuable flameproofing agents for rigid and flexible polyurethane foams and for thermoplastic polyolefin and polyester foams.