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:
Feb. 25, 2003
Filed:
Aug. 14, 2001
Applicant:
Inventors:
Carmen Arnalot I Aguilar, Girona, ES;
Jordi Bosch I Lladó, Girona, ES;
Ma Carmen Onrubia Miguel, Barcelona, ES;
Assignee:
Medichem, S.A., Barcelona, ES;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
C07D / ;
Abstract
The invention discloses a process for the preparation of the polymorh A of doxazosin meylate, consisting essentially of reacting doxazosin base with methanesulfonic acid in a mixture of solvents containing an alcohol and a chlorinated solvent, subsequently removing the chlorinated solvent by distillation and precipitating the desired product in an alcohol, after heating the suspension formed to the reflux temperature of the solvent.