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:
Jul. 27, 2010
Filed:
Feb. 20, 2008
Ashok Kumar, Maharashtra, IN;
Dharmendra Singh, Maharashtra, IN;
Ganesh Devidas Mahale, Maharashtra, IN;
Ragnesh Kumar Rana, Maharashtra, IN;
Mahesh Kharade, Maharashtra, IN;
Ashok Kumar, Maharashtra, IN;
Dharmendra Singh, Maharashtra, IN;
Ganesh Devidas Mahale, Maharashtra, IN;
Ragnesh Kumar Rana, Maharashtra, IN;
Mahesh Kharade, Maharashtra, IN;
IPCA Laboratories Limited, Mumbai, IN;
Abstract
The present invention relates to a process for preparation of isotretinoin and more specifically, to a purification process for obtaining highly pure isotretinoin that is useful as a keratolytic agent, particularly useful for the treatment of acne. The process involves treating isotretinoin containing metal contamination and/or other impurities with a base in a suitable solvent to form a solution of isotretinoin, followed by adsorption, precipiation, and filtration or centrifugation.