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. 23, 2010
Filed:
Nov. 08, 2002
Applicants:
Steve Martin, Cramlington, GB;
Daniele Piergentili, Mannheim, IT;
Inventors:
Steve Martin, Cramlington, GB;
Daniele Piergentili, Mannheim, IT;
Assignee:
Aesica Pharmaceuticals, Cramlington, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07B 57/00 (2006.01); C07C 51/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for the recovery of substituted tartaric acid resolving agents from resolution process liquors comprising organic solvents, wherein the substituted tartaric acid derivatives are neutralised by adding a base, extracted into an aqueous phase and crystallized from the aqueous phase by addition of a mineral acid in the presence of an organic solvent.