Patents by Inventor Vidya S. Bhat

Vidya S. Bhat 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).

  • Triterpene derivatives of azadirachtin having insect antifeedant and growth inhibitory activity and a process for extracting such compounds from the neem plant
    Patent number: 5602261
    Abstract: The invention disclosed novel triterpene derivatives of azadirachtin of the formulae 2 to 11 of the drawings and a process for isolating new triterpene derivatives of azadirachtin from the various parts of the neem plant(Azadirachta indica A-Juss), which process comprises grinding the parts of the neem plant to get a powder, extracting the powder with a binary immiscible solvent consisting of one polar and another non-polar solvent in a ratio of 1:2 to obtain an extract, filtering the extract to get a filtrate having two layers, one layer containing lipids and the other layer containing the new triterpene derivatives of azadirachtin and water soluble constituents including sugars, separating the layers by known methods, concentrating the layer containing the new triterpenes of the formulae 2-11 including derviatives of azadirachtin and water soluble salts, treating the resultant concentrate with a polar solvent and if necessary, warm the concentrate having the solvent, and filtering/decanting the resultant so
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: February 11, 1997
    Assignee: Council of Scientific & Industrial Research
    Inventors: Bhimsen A. Nagasampagi, Supada R. Rojatkar, Mandakini M. Kulkarni, Vimal S. Joshi, Vidya S. Bhat, Mukund G. Sane, Nagaraj R. Ayyangar
  • Triterpene derivatives of azadirachtin having insect antifeedant and growth inhibitory activity and a process for extracting such compounds from the neem plant
    Patent number: 5395951
    Abstract: The invention discloses novel triterpene derivatives of azadirachtin of the formulae 2 to 11 of the drawings and a process for isolating new triterpene derivatives of azadirachtin from the various parts of the neem plant(Azadirachta indica A-Juss), which process comprises grinding the parts of the neem plant to get a powder, extracting the powder with a binary immiscible solvent consisting of one polar and another non-polar solvent in a ratio of 1:2 to obtain an extract, filtering the extract to get a filtrate having two layers, one layer containing lipids and the other layer containing the new triterpene derivatives of azadirachtin and water soluble constituents including sugars, separating the layers by known methods, concentrating the layer containing the new triterpenes of the formulae 2-11 including derivatives of azadirachtin and water soluble salts, treating the resultant concentrate with a polar solvent and if necessary, warm the concentrate having the solvent, and filtering/decanting the resultant so
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: March 7, 1995
    Assignee: Council of Scientific & Industrial Research
    Inventors: Bhimsen A. Nagasampagi, Supada R. Rojatkar, Mandakini M. Kulkarni, Vimal S. Joshi, Vidya S. Bhat, Mukund G. Sane, Nagaraj R. Ayyangar