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:
Jul. 12, 2005
Filed:
Nov. 25, 2002
Applicants:
Oliver Meyer, Münster, DE;
Thomas Kalz, Herne, DE;
Karlheinz Drauz, Freigericht, DE;
Inventors:
Assignee:
Degussa AG, Dusseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C229/00 ;
U.S. Cl.
CPC ...
Abstract
The present invention is directed to a method for producing amino acids by reacting halogenated carboxylic acid ester (haloacid esters) with a metal cyanate in the presence of an alcohol and by subsequent acidic saponification of the urethane carbonic acid formed. The method is characterized by the metal cyanate being placed at an elevated temperature in an organic solvent and the other reactants being continuously charged into the mixture over a defined time period.