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:
Jan. 04, 2005
Filed:
Apr. 22, 2003
Applicants:
Arun Prakash Sharma, Nadia, IN;
Subrata Sarkar, Nadia, IN;
Jyan Shanker Mahanty, Nadia, IN;
Inventors:
Assignee:
Dabur India Limited, West Bengal, IN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D30514 ;
U.S. Cl.
CPC ...
Abstract
A process for converting paclitaxel or docetaxel to the respective trihydrate characterized by very high purity, comprises dissolving either paclitaxel or docetaxel in a mixture of alkane and chlorinated alkane to provide a crude product of 65-75% assay and dissolving the crude product in an alkyl ketone, followed by addition of an alkane to provide a product of increased chromatographic purity; dissolving the product of increased chromatographic purity in an aliphatic nitrile, with addition of water to precipitate taxane trihydrate.