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:
Sep. 07, 1982
Filed:
Jan. 18, 1980
Applicant:
Inventors:
Bernhard Albrecht, Buus, CH;
Hans Frey, Bettingen, CH;
Vinzenz Habermacher, Basel, CH;
Horst Behre, Odenthal, DE;
Lutz Kienitz, Bergisch Gladbach, DE;
Wolfgang Schenk, Leverkusen, DE;
Guido Steffan, Odenthal, DE;
Axel Vogel, Odenthal, DE;
Assignees:
Ciba-Geigy AG, Basel, CH;
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
A process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid by sulfonating naphthalene, nitrating the sulfonation product, and separating the pure magnesium salt of 3-nitronaphthalene-1,5-disulfonic acid, which process comprises: