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:
Mar. 27, 1979
Filed:
Jun. 30, 1977
Applicant:
Inventors:
Alfred Schuhmacher, Ludwigshafen, DE;
Karl-Erich Kling, Frankenthal, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260364 ;
Abstract
A process for the manufacture of Bz-1-bromobenzanthrone by brominating finely divided benzanthrone in aqueous suspension, wherein the improvement comprises treating benzanthrone having a mean particle size of 30 .mu.m or less with bromine or brominating agent at above 80.degree. C. A product which contains from 91 to 94% by weight of Bz-1-bromobenzanthrone is obtained.