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:
Jun. 14, 1983
Filed:
Feb. 13, 1980
Applicant:
Inventors:
Claudine Mauric, Basel, CH;
Rainer Wolf, Allschwil, CH;
Assignee:
Sandoz Ltd., Basel, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ;
U.S. Cl.
CPC ...
524119 ; 57904 ; 521907 ; 524710 ;
Abstract
A group of diphosphonic acid tetra-esters and phosphonic or thiophosphonic acid O,O,O-triesters containing dioxaphosphorinane rings are useful as flame retardants for polymeric organic materials, particularly polyesters. The compounds, some of which are novel, are prepared by reaction of the corresponding phosphites with peroxy compounds or with sulphur.