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:
Feb. 22, 1977
Filed:
Dec. 12, 1974
Applicant:
Inventors:
Horst Scheuermann, Ludwigshafen, DT;
Walter Stilz, Mannheim, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
2604 / ; 26029364 ; 2602 / ; 2602 / ; 2602 / ; 26032687 ; 2604 / ; 2604 / ; 2604 / ; 2604 / ; 260490 ; 26050115 ; 2605 / ; 2602 / ; 2605 / ; 2605 / ; 260944 ; 260945 ; 8 1 / ; 8DIG / ; 2605 / ; 25230121 ; 25230122 ;
Abstract
Bisstyryl-substituted aryl compounds of the formula (I): ##STR1## where X is arylene and R.sup.1 and R.sup.5 are substituents common to the dye art. The compounds are useful as optical brighteners, particularly for acrylonitrile polymers, and give excellent whitening having good fastness properties.