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:
Sep. 19, 2017
Filed:
Apr. 19, 2015
Applicant:
Granules India Limited, Hyderabad, IN;
Inventors:
Prasada Raju Vetukuri Vnkv, Hyderabad, IN;
Goverdhan Gilla, Hyderabad, IN;
Ambaiah Boini, Hyderabad, IN;
Krishna Prasad Chigurupati, Hyderabad, IN;
Assignee:
GRANULES INDIA LIMITED, Hyderabad, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 498/22 (2006.01);
U.S. Cl.
CPC ...
C07D 498/22 (2013.01); C07B 2200/13 (2013.01);
Abstract
The present invention relates to an improved and industrially advantageous process for the preparation of Rifaximin with high purity and yield. Particularly, the present invention relates to improved processes for the preparation of Rifaximin from Rifamycin O and S. More particularly the present invention relates to a process for the preparation of Rifaximin through 3-halorifamycin S. The present invention further relates to a novel polymorph of Rifaximin and process for its preparation.