Patents by Inventor U Amarnath

U Amarnath 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).

  • One pot process for the preparation of telmisartan
    Patent number: 9499491
    Abstract: A process for the preparation of bromine free telmisartan in one pot starting from 2-cyano-4?-methyl biphenyl. The process uses raw materials which are readily available to yield telmisartan, its salts and derivatives thereof, which are bromine free and potentially less genotoxic, since there is no bromine atom in any of the raw materials. The process can also be carried out in multiple steps by isolation of the intermediate compounds. The intermediate compound 4-chloromethyl-2?-cyanobiphenyl can also be used for the preparation of irbesartan and other sartans.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: November 22, 2016
    Inventors: U Amarnath, U Suryakiran
  • ONE POT PROCESS FOR THE PREPARATION OF TELMISARTAN
    Publication number: 20150197495
    Abstract: A process for the preparation of bromine free telmisartan in one pot starting from 2-cyano-4?-methyl biphenyl. The process uses raw materials which are readily available to yield telmisartan, its salts and derivatives thereof, which are bromine free and potentially less genotoxic, since there is no bromine atom in any of the raw materials. The process can also be carried out in multiple steps by isolation of the intermediate compounds. The intermediate compound 4-chloromethyl-2?-cyanobiphenyl can also be used for the preparation of irbesartan and other sartans.
    Type: Application
    Filed: February 16, 2015
    Publication date: July 16, 2015
    Inventors: U Amarnath, U Suryakiran