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:
Jun. 01, 1999
Filed:
Jan. 26, 1998
Angela Wildermann, Bad Sackingen, DE;
Roche Vitamins Inc., Parsippany, NJ (US);
Abstract
A process is disclosed for the catalyzed isomerization of a Z-isomer of a vitamin A compound or of a mixture of several of such isomers into a mixture of the corresponding all-E- and 13-Z-isomers of this vitamin A compound. The process utilizes nitrogen monoxide or a gas mixture containing nitrogen monoxide as the isomerization catalyst. Vitamin A acetate or vitamin A acid is preferably used as the vitamin A compound. The thus-produced all-E vitamin A and its alkanoyl esters have of all isomers by far the highest biological activity and are accordingly almost exclusively used in human and animal nutrition. The 13-Z-vitamin A compounds in turn play an important role as pharmaceutically active substances.