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:
Dec. 02, 1980
Filed:
Dec. 20, 1978
Werner Grawert, Radebeul, DD;
Ludwig Schiedt, Radebeul, DD;
Brigitte Neumann, Dresden, DD;
Karlheinz Heidenbluth, Radebeul, DD;
Christoph Dauth, Radebeul, DD;
Rudolf Schirutschke, Radebeul, DD;
Monika Muller, Radebeul, DD;
VEB Arzneimittelwerk Dresden, Radebeul, DD;
Abstract
A process for isolating ergot alkaloids from culture suspensions, in which after mechanical filtration, the residue is dried in a fluidized drying bed and the alkaloids are extracted with an aprotic organic solvent, reextracted with a weakly acidic aqueous solution which is subsequently made basic, and finally extracted with a water-immiscible organic solvent, from which the alkaloids are isolated in a conventional manner. In certain instances, the culture suspension is stirred with an adsorbent clay to entrain the water-soluble alkaloids.