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:
May. 12, 2015
Filed:
Aug. 29, 2012
Applicants:
Martin Steffan, Darmstadt, DE;
Hans Joachim Hasselbach, Gelnhausen, DE;
Martin Koerfer, Kahl, DE;
Harald Jakob, Hasselroth, DE;
Jignesh Gangadwala, Mobile, AL (US);
Inventors:
Martin Steffan, Darmstadt, DE;
Hans Joachim Hasselbach, Gelnhausen, DE;
Martin Koerfer, Kahl, DE;
Harald Jakob, Hasselroth, DE;
Jignesh Gangadwala, Mobile, AL (US);
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 319/12 (2006.01); C07C 319/20 (2006.01); C07C 319/28 (2006.01);
U.S. Cl.
CPC ...
C07C 319/12 (2013.01); C07C 319/20 (2013.01); C07C 319/28 (2013.01);
Abstract
A reactive rectification column suitable for the production of 2-hydroxy-4-methylmercaptobutyric acid and/or methionine contains a weir having a height of 100 mm or more.