Patents by Inventor A. J. Gehan Amaratunga

A. J. Gehan Amaratunga 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).

  • Composition and method for sustained release of agricultural macronutrients
    Patent number: 8696784
    Abstract: A fertilizer composition wherein a nitrogen containing macronutrient is adsorbed on the surface of hydroxyapatite phosphate nanoparticles. Said fertilizer composition slowly releases the nitrogen containing macronutrient to soil.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: April 15, 2014
    Assignee: Sri Lanka Institute of Nanotechnology (Pvt) Ltd
    Inventors: Nilwala Kottegoda, Gayan Priyadharshana, Chanaka Sandaruwan, Damayanthi Dahanayake, Sunanda Gunasekara, A. J. Gehan Amaratunga, Veranja Karunaratne
  • COMPOSITION AND METHOD FOR SUSTAINED RELEASE OF AGRICULTURAL MACRONUTRIENTS
    Publication number: 20130098125
    Abstract: A fertilizer composition wherein a nitrogen containing macronutrient is adsorbed on the surface of hydroxyapatite phosphate nanoparticles. Said fertilizer composition slowly releases the nitrogen containing macronutrient to soil.
    Type: Application
    Filed: December 7, 2012
    Publication date: April 25, 2013
    Applicant: SRI LANKA INSTITUTE OF NANOTECHNOLOGY (PVT) LTD.
    Inventors: Nilwala Kottegoda, Gayan Priyadharshana, Chanaka Sandaruwan, Damayanthi Dahanayake, Sunanda Gunasekara, A. J. Gehan Amaratunga, Veranja Karunaratne