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:
Apr. 28, 1998
Filed:
Dec. 13, 1996
Applicant:
Inventors:
Ulrich Fechtel, Ober-Ramstadt, DE;
Karlheinz Wembacher, Pfungstadt, DE;
Assignee:
Merck Patent Gesellschaft Mit Beschrankter Haftung, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549315 ;
Abstract
A process for the preparation of L-ascorbic acid by reacting 2-keto-L-gulonic acid with aqueous mineral acid in a solvent mixture containing an inert organic solvent, an aliphatic ketone and also an acid chloride.