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. 01, 2011
Filed:
Jan. 12, 2009
Uma Maheswer Rao Vasireddy, Andharapradesh, IN;
Siva Rama Prasad Vellanki, Andharapradesh, IN;
Raja Babu Balusu, Andharapradesh, IN;
Naga Durga Rao Bandi, Andharapradesh, IN;
Pavan Kumar Jujjavarapu, Andharapradesh, IN;
Sambasiva Rao Ginjupalli, Andharapradesh, IN;
Rama Krishna Pilli, Andharapradesh, IN;
Uma Maheswer Rao Vasireddy, Andharapradesh, IN;
Siva Rama Prasad Vellanki, Andharapradesh, IN;
Raja Babu Balusu, Andharapradesh, IN;
Naga Durga Rao Bandi, Andharapradesh, IN;
Pavan Kumar Jujjavarapu, Andharapradesh, IN;
Sambasiva Rao Ginjupalli, Andharapradesh, IN;
Rama Krishna Pilli, Andharapradesh, IN;
Matrix Laboratories Ltd., Secunderabad, IN;
Abstract
The present invention relates to novel Tenofovir disoproxil hemifumarate salt, which is prepared by dealkylation of Phosphonate esters by using mineral acids followed by esterification and crystallization to give crystalline Tenofovir disoproxil. The Tenofovir disoproxil is further converted to fumarate salts with improved yield.