US Patent 7485726 Process for the preparation of risedronate sodium hemi-pentahydrate
Patent 7485726 was granted and assigned to Aurobindo Pharma on February, 2009 by the United States Patent and Trademark Office.
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Patent Inventor Names
Lenin Racha0
Ramesh Dandala0
Sivakumaran Meenakshisunderam0
Srinivasa Rao V. N Divvela0
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Patent abstract
The present invention relates to an improved process for the selective crystallization of 3-pyridyl-1-hydroxyethylidene-1,1-bisphosphonic acid sodium in pure hemi-pentahydrate form of Formula (I), by first converting 3-pyridyl-1-hydroxyethylidene-1,1-bisphosphonic acid into organic amine salt and then by replacing it with sodium salt.
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US Patent 07485726 Process for the preparation of risedronate sodium hemi-pentahydrate US Patent 7485726 Process for the preparation of risedronate sodium hemi-pentahydrate
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Patent Number
07485726
Patent Number
7485726
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US Patent 07485726 Process for the preparation of risedronate sodium hemi-pentahydrate
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Is a
Current assignee
Patent jurisdiction
Patent number
07485726
Date of patent
February 3, 2009
Patent application number
11653556
Date Filed
January 16, 2007
Patent primary examiner
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