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:
Aug. 24, 2004
Filed:
Jul. 25, 2002
Applicant:
Inventors:
Alfons Karl, Gruendau, DE;
Ralph McIntosh, Hanau, DE;
Werner Kalbitz, Rodenbach, DE;
Horst Kleinhenz, Grosskrotzenburg, DE;
Gerd Tauber, Seligenstadt, DE;
Stephan Luedtke, Biebergemeund, DE;
Assignee:
Degussa AG, Duesseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/56 ;
U.S. Cl.
CPC ...
C09C 1/56 ;
Abstract
A process for the production of modified carbon black, in which a carbon black dispersion containing carbon black, water and wetting agent, is mixed with an acid, aqueous solution or suspension of a primary amine and then reacted with sodium nitrite solution.