Patents by Inventor Ch. A. P. Rameswara Rao

Ch. A. P. Rameswara Rao 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 levothyroxine sodium
    Patent number: 9428444
    Abstract: The present invention provides a novel process for the preparation of highly pure Levothyroxine Sodium, i.e., (S)-2-amino-3-[4-(4-hydroxy-3, 5-diiodophenoxy)-3,5-diiodophenyl] propanoic acid sodium salt via two process intermediates viz 3,5-Diiodo L-Tyrosine copper complex and novel Bis (p-anisyl) iodonium Iodide. The invention also provides levothyroxine pentahydrate free from genotoxic impurities and liothyronine levels below 0.04% wt/wt.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: August 30, 2016
    Assignee: AZICO BIOPHORE INDIA PRIVATE LIMITED
    Inventors: Ch. A. P. Rameswara Rao, Sreenath Dasari