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:
Nov. 09, 1999
Filed:
Jun. 23, 1998
Applicant:
Inventors:
Herbert Tanner, Hanau, DE;
Karlheinz Drauz, Freigericht-Somborn, DE;
Gerhard Sator, Dieburg, DE;
Horst Bethge, Rodenbach, DE;
Roland Moller, Hammersbach, DE;
Frank Hubner, Ober-Ramstadt, DE;
Thomas Tacke, Friedrichsdorf, DE;
Claus Rehren, Aschaffenburg, DE;
Assignee:
Asta Medica Aktiengesellschaft, Dresden, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549 79 ;
Abstract
The present invention is relative to a method of producing dry thioctic acid in which a raw material in which concentrated thioctic acid is present is treated with liquid or supercritical CO.sub.2, thus yielding thioctic acid with low residual solvent contents in a simple industrial method.