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. 28, 1992
Filed:
Mar. 12, 1990
Applicant:
Inventor:
Martin Eyer, Glis, CH;
Assignee:
Lonza Ltd., Gampel/Valais, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
548113 ; 548303 ;
Abstract
Process for the preparation of 1,3-substituted tetrahydro-1H-thieno[3,4-d]-imidazol-2(3H)-on-4-ylidene pentanoic acid esters which are intermediate products for the production of the pharmaceutic active substance (+)-biotin.