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. 15, 2011
Filed:
Dec. 22, 2008
Gorantla Seeta Ramanjaneyulu, Secunderabad, IN;
Indukuri Venkata Sunil Kumar, Hyderabad, IN;
Ketavarapu Narasimha Rao, Hyderabad, IN;
Jammula Vera Venkata Krishna Kishore, Hyderabad, IN;
Gorantla Seeta Ramanjaneyulu, Secunderabad, IN;
Indukuri Venkata Sunil Kumar, Hyderabad, IN;
Ketavarapu Narasimha Rao, Hyderabad, IN;
Jammula Vera Venkata Krishna Kishore, Hyderabad, IN;
Matrix Laboratories Ltd., Secunderabad, IN;
Abstract
A cost-effective, industrially feasible process for the manufacture of crystalline Carvedilol Form-II using novel Carvedilol salts comprises the steps of reacting 4-(2,3-epoxy propoxy)carbazole (II) with 2-(2-methoxy phenoxy)ethyl amine (III) followed by acidification with mineral acid in presence of an organic solvent to yield acid addition salts, treatment of the said salts with base(s) in presence of organic solvent(s), water and isolation from the organic solvent(s) followed by crystallization from ethyl acetate.