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. 30, 2014
Filed:
Jul. 19, 2011
Wolfgang Hölderich, Frankenthal, DE;
Verena Ritzerfeld, Aachen, DE;
Bernhard Markus Ernst Russbüldt, Düren, DE;
Erhard Henning Fleischhauer, Aachen, DE;
Werner Bonrath, Basel, CH;
Reinhard Karge, Basel, CH;
Jan Schütz, Basel, CH;
Wolfgang Hölderich, Frankenthal, DE;
Verena Ritzerfeld, Aachen, DE;
Bernhard Markus Ernst Russbüldt, Düren, DE;
Erhard Henning Fleischhauer, Aachen, DE;
Werner Bonrath, Basel, CH;
Reinhard Karge, Basel, CH;
Jan Schütz, Basel, CH;
DSM IP Assets B.V., Heerlen, NL;
Abstract
Use of pure lanthanum oxide which is obtained by calcination of oxygen-containing lanthanum salts at temperatures of at least 700° C. as heterogeneous catalyst in the aldol condensation of citral and acetone to give pseudoionone, and process for the preparation of pseudoionone by aldol condensation of citral and acetone in the liquid phase using pure lanthanum oxide.