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. 22, 1979
Filed:
Nov. 12, 1976
Applicant:
Inventor:
Frank Kienzle, Therwil, CH;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 61 ; 560129 ; 560131 ; 560226 ; 568823 ; 568828 ; 2604 / ; 2604 / ;
Abstract
15,15'-Didehydro-astaxanthin and ester derivatives thereof useful as coloring agents and intermediates for astaxanthin and a method for preparing astaxanthin from keto .alpha.-isophorone and intermediates therein.