Patents by Inventor A. Nadeesh Madusanka

A. Nadeesh Madusanka 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).

  • Cellulose based sustained release macronutrient composition for fertilizer application
    Patent number: 8617284
    Abstract: A macronutrient sustained release composition for a plant locus having nitrogen containing macronutrient compound adsorbed on the surface of hydroxyapatite phosphate nanoparticles, and a process for preparation thereof. The macronutrient adsorbed hydroxyapatite phosphate nanoparticles are encapsulated within cavities present in wood such that the biodegradation of the wood releases the adsorbed macronutrient compounds in a slow and sustained manner to the soil. Further, the macronutrient particles are encapsulated within the cell cavities of wood and wood is coated with cellulose modified hydroxyapatite phosphate nanoparticles such that the rupture of the nanocoating initiates the nitrogen release followed by the biodegradation of the wood releases the rest of the adsorbed macronutrient compounds in a slow and sustained manner to the soil.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: December 31, 2013
    Assignee: Sri Lanka Institute of Nanotechnology (Pvt) Ltd
    Inventors: Nilwala Kottegoda, Imalka Munaweera, Lilantha Samaranayake, Sunanda Gunasekara, Ajith De Alwis, Veranja Karunaratne, A. Nadeesh Madusanka
  • Compositions for sustained release of agricultural macronutrients and process thereof
    Patent number: 8361185
    Abstract: A macronutrient sustained release composition for a plant locus containing a nanocomposite wherein a nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles is intercalated within the interlayer spacing of a nanoclay. The nanocomposite containing the adsorbed macronutrient compounds is slowly released in a sustained manner when contacted with an acidic soil.
    Type: Grant
    Filed: June 5, 2010
    Date of Patent: January 29, 2013
    Assignee: Sri Lanka Istitute of Nanatechnology (PVT) Ltd.
    Inventors: Nilwala Kottegoda, Imalka Munaweera, A. Nadeesh Madusanka, Veranja Karunaratne
  • COMPOSITIONS FOR SUSTAINED RELEASE OF AGRICULTURAL MACRONUTRIENTS AND PROCESS THEREOF
    Publication number: 20110296885
    Abstract: A macronutrient sustained release composition for a plant locus containing a nanocomposite wherein a nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles is intercalated within the interlayer spacing of a nanoclay. The nanocomposite containing the adsorbed macronutrient compounds is slowly released in a sustained manner when contacted with an acidic soil.
    Type: Application
    Filed: June 5, 2010
    Publication date: December 8, 2011
    Applicant: SRI LANKA INSTITUTE OF NANOTECHNOLOGY (PVT) LTD.
    Inventors: Kottegoda Nilwala, Imalka Munaweera, A. Nadeesh Madusanka, Veranja Karunaratne
  • CELLULOSE BASED SUSTAINED RELEASE MACRONUTRIENT COMPOSITION FOR FERTILIZER APPLICATION
    Publication number: 20110296887
    Abstract: A macronutrient sustained release composition for a plant locus having nitrogen containing macronutrient compound adsorbed on the surface of hydroxyapatite phosphate nanoparticles, and a process for preparation thereof. The macronutrient adsorbed hydroxyapatite phosphate nanoparticles are encapsulated within cavities present in wood such that the biodegradation of the wood releases the adsorbed macronutrient compounds in a slow and sustained manner to the soil. Further, the macronutrient particles are encapsulated within the cell cavities of wood and wood is coated with cellulose modified hydroxyapatite phosphate nanoparticles such that the rupture of the nanocoating initiates the nitrogen release followed by the biodegradation of the wood releases the rest of the adsorbed macronutrient compounds in a slow and sustained manner to the soil.
    Type: Application
    Filed: June 6, 2011
    Publication date: December 8, 2011
    Applicant: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Nilwala Kottegoda, Imalka Munaweera, Lilantha Samaranayake, Sunanda Gunasekara, Ajith De Alwis, Veranja Karunaratne, A. Nadeesh Madusanka