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:
Aug. 11, 1981
Filed:
May. 21, 1979
Applicant:
Inventors:
Emil A Broger, Magden, CH;
Yvo Crameri, Oberwil, CH;
Hans G Leuenberger, Battwil, CH;
Erich Widmer, Munchenstein, CH;
Reinhard Zell, Rodersdorf, CH;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
568 11 ; 2603 / ; 568378 ;
Abstract
The compound 6-hydroxy-3-(5-hydroxy-3-methyl-1,3-pentadienyl)-2,4,4-trimethyl-2-cyclohe xen-1-one useful as intermediate for producing the natural coloring agent astaxanthin as well as a method for synthesizing astaxanthin from this compound and synthesizing the compound from 2-hydroxyketo isophorone.