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. 14, 2012
Filed:
Nov. 19, 2007
Manne Satyanarayana Reddy, Hyderabad, IN;
Muppa Kishore Kumar, Hyderabad, IN;
Karamala Rama Subba Reddy, Kadapa, IN;
Durgadas Shyla Prasad, Hyderabad, IN;
Manne Satyanarayana Reddy, Hyderabad, IN;
Muppa Kishore Kumar, Hyderabad, IN;
Karamala Rama Subba Reddy, Kadapa, IN;
Durgadas Shyla Prasad, Hyderabad, IN;
MSN Laboratories Limited, Hyderabad, Andhra Pradesh, IN;
Abstract
The present invention provides an improved process for the preparation of highly pure montelukast sodium through highly pure diol intermediate compound of formula (2) and (1)-(mercapto methyl)cyclopropane acetic acid methyl ester compound of formula (4) or mercaptomethyl cyclopropane acetic acid compound of formula (7). The present invention also provides novel organic amine salts of montelukast.