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:
Oct. 13, 2009
Filed:
Aug. 02, 2006
Fabrice Aquino, Reiningue, FR;
Werner Bonrath, Freiburg, DE;
Patrick Bohrer, Hegenheim, FR;
Max Hugentobler, Arlesheim, CH;
Thomas Netscher, Bad Krozingen, DE;
Alexander Radspieler, Grenzach-Wyhlen, DE;
Fabrice Aquino, Reiningue, FR;
Werner Bonrath, Freiburg, DE;
Patrick Bohrer, Hegenheim, FR;
Max Hugentobler, Arlesheim, CH;
Thomas Netscher, Bad Krozingen, DE;
Alexander Radspieler, Grenzach-Wyhlen, DE;
DSM IP Assets B.V., Heerlen, NL;
Abstract
A process for the preparation of ubihydroquinones and ubiquinones by condensation of a prenol or isoprenol with a hydroquinone or derivative thereof in the presence of 0.005-1.0 mol % of a catalyst which is a Broensted-acid, a Lewis-acid from the group consisting of a derivative of Bi or In or an element of group 3 of the periodic table of the elements, a heteropolyacid, an NH— or a CH-acidic compound, and optionally oxidizing the ubihydroquinone obtained.