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:
Nov. 28, 1989
Filed:
Jul. 01, 1988
Applicant:
Inventors:
Kurt Bernhard, Lupsingen, CH;
Stephan Jaggli, Bubendorf, CH;
Paul Kreienbuhl, Riehen, CH;
Ulrich Schwieter, Reinach, CH;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ;
U.S. Cl.
CPC ...
549341 ; 549342 ; 549369 ; 549370 ; 549375 ; 549415 ; 549420 ; 549421 ; 560 11 ; 560194 ; 562429 ; 568 28 ; 568 31 ; 568 32 ; 568 33 ; 568 34 ;
Abstract
A process for producing carotenoids and carotenoid intermediates via reduction of sulfonyl polyenes with a dithionite in the presence of ammonia or an aliphatic amine, including novel intermediates in this process, which carotenoids are known coloring agents for foodstuffs, animal feeds, pharmaceuticals, etc.