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. 03, 1976
Filed:
Dec. 13, 1972
Applicant:
Inventors:
Zdenek Allan, Allschwil, CH;
August Schweizer, Muttenz, CH;
Assignee:
Sandoz Ltd., (Sandoz AG), Basel, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260510 ; 260180 ;
Abstract
The invention concerns a novel process for the production of benzidine compounds having at least one nuclear sulphonic acid group, comprising reacting a nitro- or nitroso-benzene with an aniline or mono-N-alkyl aniline, reducing the reaction product to a hydrazo compound and rearranging this to the benzidine compound.