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:
Nov. 30, 1976
Filed:
Apr. 05, 1974
Applicant:
Inventors:
Borivoj Richard Franko-Filipasic, Morrisville, PA (US);
Edward F Orwoll, Langhorne, PA (US);
Vithal C Patel, Glen Burnie, MD (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C09K / ;
U.S. Cl.
CPC ...
2609 / ; 260973 ;
Abstract
A new class of polymeric phosphazenes with P--O--P oxygen linkages useful in rendering rayon flame retardant are prepared through the condensation of alkyl esters of phosphorus acids with acid halides of phosphorus acids with elimination of alkyl halides.