Patents by Inventor Rajendra Patil

Rajendra Patil 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 eco-friendly preparation of 3, 5-dibromo-4-hydroxybenzonitrile
    Patent number: 8957239
    Abstract: A highly pure 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) has been prepared in high yield from 4-hydroxybenzonitrile using eco-friendly brominating reagent comprising of 2:1 mole ratio of bromide to bromate salts in aqueous acidic medium without any catalyst under ambient conditions with no work up procedure. The product 3,5-dibromo-4-hydroxybenzonitrile was obtained in 91-99% yield with melting point 189-191° C. and more than 99% purity by gas chromatographic analysis without any purification.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: February 17, 2015
    Assignee: Council of Scientific and Industrial Research
    Inventors: Subbarayappa Adimurthy, Gadde Ramachandraiah, Girdhar Joshi, Rajendra Patil, Maheshkumar Ramniklal Gandhi, Mallampati Subbareddy, Pratyush Maiti
  • PROCESS FOR THE ECO-FRIENDLY PREPARATION OF 3, 5-DIBROMO-4-HYDROXYBENZONITRILE
    Publication number: 20130331596
    Abstract: A highly pure 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) has been prepared in high yield from 4-hydroxybenzonitrile using eco-friendly brominating reagent comprising of 2:1 mole ratio of bromide to bromate salts in aqueous acidic medium without any catalyst under ambient conditions with no work up procedure. The product 3,5-dibromo-4-hydroxybenzonitrile was obtained in 91-99% yield with melting point 189-191° C. and more than 99% purity by gas chromatographic analysis without any purification.
    Type: Application
    Filed: February 25, 2010
    Publication date: December 12, 2013
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Subbarayappa Adimurthy, Gadde Ramachandraiah, Girdhar Joshi, Rajendra Patil, Maheshkumar Ramniklal Gandhi, Mallampati Subrareddy, Pratyush Maiti