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. 24, 1985
Filed:
May. 12, 1981
Applicant:
Inventors:
Volkmar Weberndoerfer, Mannheim, DE;
Friedrich Brunnmueller, Ludwigshafen, DE;
Manfred Eisert, Ludwigshafen, DE;
Rudolf Bermes, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
534728 ; 1062 / ; 1063 / ; 106309 ; 26024578 ; 260372 ; 2605 / ; 534689 ; 534887 ; 544209 ; 544210 ; 544219 ; 546101 ;
Abstract
A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is