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:
Apr. 06, 1976
Filed:
Dec. 01, 1971
Applicant:
Inventors:
Walter Beck, Bedford, MA (US);
David Y Kim, Lowell, MA (US);
Assignee:
Stepan Chemical Company, Northfield, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C08K / ;
U.S. Cl.
CPC ...
260949 ; 260 / ; 260814 ; 260953 ;
Abstract
A phosphite ester of a hindered bis phenol of the formula: ##SPC1## Wherein X is an alkylene radical or sulfur, R is hydrogen or alkyl, and R.sub.1 is alkyl, cycloalkyl or an alkyl-substituted aryl radical, which compounds are useful as stabilizers for polymeric materials.