Patents by Inventor Gangapuram Madhavi

Gangapuram Madhavi 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 VINYLPYRIDINE FROM PICOLINE OVER MODIFIED ZEOLITES
    Publication number: 20040087799
    Abstract: The present invention relates to an improved eco-friendly process for the preparation of vinylpyridine from corresponding picoline over modified zeolite catalyst in vapour phase which comprises reacting picoline with formaldehyde with a molar ratio of formaldehyde to picoline in the range of 1:1 to 4:1, at a temperature ranging between 200° C. to 450° C., at a weight hourly space velocity in the range of 0.25 hr−1-1.00 hr−1 over a modified commercial zeolite catalyst to obtain a high yield and selectivity of the desired product.
    Type: Application
    Filed: October 31, 2002
    Publication date: May 6, 2004
    Inventors: Shivanand Janardan Kulkarni, Gangapuram Madhavi, Venkataraman Viswanathan, Kondapuram Vi jaya Raghavan
  • Process for the preparation of vinylpyridine from picoline over modified zeolites
    Patent number: 6727365
    Abstract: The present invention relates to an improved eco-friendly process for the preparation of vinylpyridine from corresponding picoline over modified zeolite catalyst in vapour phase which comprises reacting picoline with formaldehyde with a molar ratio of formaldehyde to picoline in the range of 1:1 to 4:1, at a temperature ranging between 200° C. to 450° C., at a weight hourly in the range of 0.25 hr−1-1.00 hr−1 over a modified commercial zeotlite catalyst to obtain a high yield and selectivity of the desired product.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: April 27, 2004
    Inventors: Shivanand Janardan Kulkarni, Gangapuram Madhavi, Venkataraman Viswanathan, Kondapuram Vi jaya Raghavan