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:
Oct. 02, 1984
Filed:
Apr. 05, 1982
Applicant:
Inventors:
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564420 ; 564410 ; 564421 ; 564422 ; 564423 ;
Abstract
A process for preparing an N,N-disubstituted p-phenylenediamine of the formula ##STR1## wherein R.sup.1 is alkyl of 1-6 C atoms, R.sup.2 is alkyl of 1-6 C atoms or alkyl of 1-6 C atoms which is substituted by OH, lower alkoxy, a sulfo group or an alkylsulfonamido group and R.sup.3 is hydrogen or lower alkyl