Patents by Inventor Bhimsen Annacharya Nagasampagi

Bhimsen Annacharya Nagasampagi 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
    Patent number: 5900493
    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 s
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: May 4, 1999
    Assignee: Council of Scientific and Industrial Research
    Inventors: Bhimsen Annacharya Nagasampagi, Supada Rambhau Rojatkar, Mandakini Moreshwar Kulkarni, Vimal Shantaram Joshi, Vidya Sudhir Bhat, Mukund Gangadhar Sane, Nagaraj Ramanuj Ayyangar
  • Triterpene derivatives of azadirachtin having insect antifeedant and growth inhibitory activity
    Patent number: 5756773
    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 s
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: May 26, 1998
    Assignee: Council of Scientific & Industrial Research
    Inventors: Bhimsen Annacharya Nagasampagi, Supada Rambhau Rojatkar, Mandakini Moreshwar Kulkarni, Vimal Shantaram Joshi, Vidya Sudhir Bhat, Mukund Gangadhar Sane, Nagaraj Ramanuj 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: 5663374
    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: January 11, 1996
    Date of Patent: September 2, 1997
    Assignee: Council of Scientific & Industrial Research
    Inventors: Bhimsen Annacharya Nagasampagi, Supada Rambhau Rojatkar, Mandakini Moreshwar Kulkarni, Vimal Shantaram Joshi, Vidya Sudhir Bhat, Mukund Gangadhar Sane, Nagaraj Ramanuj Ayyangar