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:
Jan. 21, 1992
Filed:
Mar. 04, 1991
Applicant:
Inventor:
Jean-Pierre Duchesne, Lyon, FR;
Assignee:
Rhone Poulenc Nutrition Animale, Commentry, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549 53 ; 549 49 ; 585357 ;
Abstract
A sulpholene compound and more particularly 4,4-dimethyl-2,2-dioxo-1,2,4,5,6,7-hexahydro-benzo[c]thiophene. These compounds are prepared by bringing myrcene sulphone into contact with a strong acid. The compounds of the present invention can be used as synthesis intermediates in the preparation of vitamin A.