Patents by Inventor Swapnil Ajit Zadbuke

Swapnil Ajit Zadbuke 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 PREPARATION OF LEVONORGESTREL
    Publication number: 20130324748
    Abstract: The present invention provides an improved process for preparation of levonorgestrel (3) which comprises of hydrolysis of 13?-ethyl-3-methoxy-17?-ethynyl-gona-2,5(10)-dien-17?-ol (2) with an acid in aprotic solvent. The present invention also provides a novel process for purification of crude levonorgestrel (3) by recrystallization from N,N-dimethyl formamide-water; methanol-water mixture.
    Type: Application
    Filed: February 14, 2012
    Publication date: December 5, 2013
    Applicant: LUPIN LIMITED
    Inventors: Swapnil Ajit Zadbuke, Kishor Gulabrao Mehare, Himanshu Madhav Godbole, Girij Pal Singh