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:
Dec. 21, 1976
Filed:
Mar. 07, 1974
Applicant:
Inventors:
Helmut Mengler, Frankfurt am Main, D;
Gunter Rosch, Altenhain, Taunus, D;
Erich Schinzel, Hofheim, Taunus, D;
Otto Smerz, Kelkheim, Taunus, D;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, D;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
2602399 ; 252-86 ; 252543 ; 2602396 ; 26023965 ; 2602409 ; 25230122 ;
Abstract
1,5-Diaryl-3-styryl pyrazolines, which are obtained by condensation of a distyryl ketone and an aliphatic 4-hydrazino-phenyl sulfone, are useful as optical brighteners, especially in admixture with known 1,3-diaryl pyrazoline brighteners.