Patents by Inventor Parendn Dhirajlal Rathod

Parendn Dhirajlal Rathod has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of clopidogrel and its pharmaceutically acceptable salts
    Patent number: 8247558
    Abstract: The present invention provides a process for the preparation of clopidogrel and its pharmaceutically acceptable salts thereof comprises the resolving racemic methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate by the salt formation of methyl alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorophenyl)-acetate with excess levorotatory camphor-10-sulfonic acid to get a maximum yield of camphor sulphonate salt of methyl S-(+)-alpha-5-(4,5,6,7-tetrahydro[3,2-c]thienopyridyl) (2-chlorophenyl)-acetate and transforming the camphor sulphonate salt to clopidogrel or its pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: August 21, 2012
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Parendn Dhirajlal Rathod, Satish Kumar Aryan, Ram Chander Aryan, Chandra Has Khanduri