Patents by Inventor Voruganti Srihari

Voruganti Srihari 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).

  • Pesticidal dry powder formulation enriched in azadirachtin up to 88% an emulsifiable concentrate enriched up to 30% of azadirachtin and a process for preparing such formulation and concentrate from neem seed/kernel
    Patent number: 5856526
    Abstract: The invention relates to a preparation of azadirachtin, in a dry solid powder form, having a purity upto 88%; an emulsion concentrate having upto 30% by weight of azadirachtin, and a process for preparing said azadirachtin dry powder from neem seeds/kernels, which comprising: (a) disintegrating the neem seeds/kernels into a powder; (b) subjecting the said powder to continuous extraction using methanol or aqueous methanol or ethanol (rectified spirit) or aqueous ethanol at ambient temperature; (c) concentrating the extract and stirring the concentrate with petroleumether or hexane and phase separating by conventional methods; (d) stirring the denser phase containing major quantity of azadirachtin with a water immiscible organic solvent and water as required depending on the solvent used for extraction and phase separating by conventional methods; (e) concentrating the organic phase and gradually adding the concentrate to petroleumether or hexane under stirring at ambient temperature (f), filtering under suctio
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: January 5, 1999
    Inventors: Akella Venkata Bhavani Sankaram, Madugula Marthandamurthi, Dattatreya Manohar Akkewar, Vedala Srinivasa Singari Ramgopal, Mukkamala Subramanyam, Voruganti Srihari, Tiruchirapally Natesan Parthasarathy, Attaluri Narasimha Rao, Jayanti Venkata Suryanarayana Murthy, Mohammed Abdul Muneem