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:
Aug. 27, 2002
Filed:
Jan. 19, 2000
Applicant:
Inventors:
Hooshang Shahriari Zavareh, Cambridge, GB;
Gerard Andrew Potter, Leicester, GB;
Assignee:
Medeva Europe Limited, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
C07D / ;
Abstract
A process for preparing an enantiomerically-enriched form of threo-ritalinic acid, which comprises resolving a mixture of enantiomers of a salt of the acid, said salt being formed with an achiral acid or base, using a chiral resolving agent. The resolved salt can be esterified, to give the therapeutic agent d-threo-methylphenidate.