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:
Apr. 27, 1993
Filed:
Aug. 06, 1991
Applicant:
Inventors:
Heinz U Blank, Odenthal, DE;
Uwe Heinz, Cologne, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
562 83 ; 562 59 ; 562 69 ; 562 73 ; 562 75 ; 562 76 ; 562 78 ;
Abstract
Aromatic (di)chlorosulphonic acids and (di)bromosulphonic acids can be prepared by reacting aromatic sulphonic acids with chlorine or bromine respectively, the reaction advantageously being carried out in the melt of the aromatic sulphonic acids.