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. 20, 1999
Filed:
Oct. 02, 1997
Applicant:
Inventors:
Gunter Eichberger, Weisskirchen, AT;
Walter Raml, Hellmonsodt, AT;
Assignee:
DSM Chemie Linz GmbH, , AT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
540588 ;
Abstract
Process for the purification of 5H-dibenz�b,f!a-zepine, which comprises evaporating 5H-dibenz�b, f!azepine under reduced pressure from a reaction mixture obtained by catalytic dehydrogenation of 10,11-dihydro-5H-dibenz-�b,f!azepine in the 1st step and depositing it as a solid, suspending the deposited product in an aromatic hydrocarbon in the 2nd step and then isolating pure 5H-dibenz�b,f!azepine.