Patents by Inventor Veranja Karunaratne

Veranja Karunaratne 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).

  • Patent number: 10927433
    Abstract: Disclosed herein is a novel approach to the chemical synthesis of titanium metal from a titanium oxide source material, such as a mineral comprising titanium. In the approach described herein, a titanium oxide source is reacted with Mg vapor to extract a pure Ti metal. The method disclosed herein is more scalable, cheaper, faster, and safer than prior art methods.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: February 23, 2021
    Assignee: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Gehan Amaratunga, Niranjala Fernando, Gayan Priyadarshana, Veranja Karunaratne, Nilwala Kottegoda
  • Patent number: 10316391
    Abstract: Disclosed herein is a novel approach to the chemical synthesis of titanium metal from a titanium oxide source material. In the approach described herein, a titanium oxide source is reacted with Mg vapor to extract a pure Ti metal. The method disclosed herein is more scalable, cheaper, faster, and safer than prior art methods.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: June 11, 2019
    Assignee: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Gayani Abayaweera, Gehan Amaratunga, Niranjala Fernando, Veranja Karunaratne, Nilwala Kottegoda, Ruwini Ekanayake
  • Patent number: 10192660
    Abstract: The compositions and methods herein relate to stable dispersions of long chain carboxylic acid-stabilized magnetite nanoparticles dispersed in alcohol. These compositions are useful in advanced biomedical applications.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: January 29, 2019
    Assignee: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Veranja Karunaratne, Gayan Priyadharshana, Sunanda Gunasekara, Nilwala Kottegoda, Atula Senaratne
  • Publication number: 20180223393
    Abstract: Disclosed herein is a novel approach to the chemical synthesis of titanium metal from a titanium oxide source material, such as a mineral comprising titanium. In the approach described herein, a titanium oxide source is reacted with Mg vapor to extract a pure Ti metal. The method disclosed herein is more scalable, cheaper, faster, and safer than prior art methods.
    Type: Application
    Filed: April 6, 2018
    Publication date: August 9, 2018
    Inventors: GAYANI ABAYAWEERA, Gehan Amaratunga, Niranjala Fernando, Veranja Karunaratne, Nilwala Kottegoda, Ruwini Ekanayake
  • Publication number: 20180037974
    Abstract: Disclosed herein is a novel approach to the chemical synthesis of titanium metal from a titanium oxide source material. In the approach described herein, a titanium oxide source is reacted with Mg vapour to extract a pure Ti metal. The method disclosed herein is more scalable, cheaper, faster, and safer than prior art methods.
    Type: Application
    Filed: August 2, 2016
    Publication date: February 8, 2018
    Inventors: GAYANI ABAYAWEERA, Gehan Amaratunga, Niranjala Fernando, Veranja Karunaratne, Nilwala Kottegoda, Ruwini Ekanayake
  • Patent number: 9109101
    Abstract: A process for producing a natural rubber nanocomposite containing exfoliated organically modified montmorillonite and maleic anhydride grafted elastomer in a dispersion of natural rubber and reinforcing filler/inert filler wherein the cured nanocomposite has improved mechanical properties compared to conventional rubber compound containing a mixture of the reinforcing filler, carbon black and the inert filler, CaCO3.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 18, 2015
    Assignee: SRI LANKA INSTITUTE OF NANOTECHNOLOGY (PUT) LTD.
    Inventors: Upul Nishantha Ratnayake, Charminda Peiris, Nanda Fernando, Sarathchandra Karunaratne, Veranja Karunaratne, Dileepa Prematunga
  • Publication number: 20140165683
    Abstract: A solid fertilizer composition wherein a nitrogen-containing macronutrient is adsorbed on the surface of hydroxyapatite phosphate nanoparticles and wherein the ratio of the nitrogen-containing macronutrient to the hydroxyapatite phosphate is between 1:1 and 10:1. In certain embodiments, said solid fertilizer composition slowly releases the nitrogen-containing macronutrient to soil.
    Type: Application
    Filed: February 20, 2014
    Publication date: June 19, 2014
    Applicant: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Nilwala Kottegoda, D.A.S. Siriwardhana, W.M.G.I. Priyadarshana, Chanaka Sandaruwan, D.A.D. Madushanka, U.A. Rathnayake, Sunanda Gunasekara, Damayanthi Dahanayake, Ajith DeAlwis, Asurusinghe Kumarasinghe, Veranja Karunaratne, Gehan Amaratunga
  • 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
  • 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
  • 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
  • Publication number: 20130062195
    Abstract: A catalyst free process for manufacturing carbon nanotubes by inducing an arc discharge from a vein graphite anode and a vein graphite cathode in an inert gas atmosphere contained in a closed vessel. The process is carried out at atmospheric pressure in the absence of external cooling mechanism for the carbon cathode or the carbon anode.
    Type: Application
    Filed: August 21, 2012
    Publication date: March 14, 2013
    Applicant: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Lilantha Samaranayake, Nilwala Kottegoda, Asurasinghe R. Kumarasinghe, Ajith De Alwis, Sunanda Gunasekara, Sameera Nanayakkara, Veranja Karunaratne
  • 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
  • Publication number: 20120056121
    Abstract: A process for making magnetite nanoparticle dispersions by reacting the surface groups of the destructured magnetite ore with carboxyl acid groups of the long chain carboxylic acid to form nanoparticles containing bound stabilizer and dispersing the nanoparticles in alcoholic solvent.
    Type: Application
    Filed: July 5, 2011
    Publication date: March 8, 2012
    Applicant: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Veranja Karunaratne, Gayan Priyadharshana, Sunanda Gunasekara, Nilwala Kottegoda, Atula Senaratne
  • Publication number: 20120004347
    Abstract: A process for producing a natural rubber nanocomposite containing exfoliated organically modified montmorillonite and maleic anhydride grafted elastomer in a dispersion of natural rubber and reinforcing filler/inert filler wherein the cured nanocomposite has improved mechanical properties compared to conventional rubber compound containing a mixture of the reinforcing filler, carbon black and the inert filler, CaCO3.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Applicant: Sri Lanka Institute of Nanotechnology (PVT) Ltd.
    Inventors: Upul Nishantha Ratnayake, Charminda Peiris, Nanda Fernando, Sarathchandra Kularatne, Veranja Karunaratne, Dileepa Prematunga
  • 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
  • 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
  • Publication number: 20110262341
    Abstract: A catalyst free process for manufacturing carbon nanotubes by inducing an arc discharge from a carbon anode and a carbon cathode in an inert gas atmosphere contained in a closed vessel. The process is carried out at atmospheric pressure in the absence of external cooling mechanism for the carbon cathode or the carbon anode.
    Type: Application
    Filed: April 25, 2010
    Publication date: October 27, 2011
    Applicant: Sri Lanka Institute of Nanotechnology (Pvt) Ltd.
    Inventors: Lilantha Samaranayake, Nilwala Kottegoda, Asurasinghe R. Kumarasinghe, Ajith De Alwis, Sunanda Gunasekara, Sameera Nanayakkara, Veranja Karunaratne
  • Publication number: 20110184006
    Abstract: A thermally stable Vitamin C composition containing montmorillonite, an organic acid containing L-ascorbic acid or a derivative thereof, a divalent cation present within nanolayers of the montmorillonite, wherein the organic acid is combined with the divalent cation within the nanolayers to form an organic acid-montmorillonite chelate.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 28, 2011
    Applicant: NATIONAL RESEARCH COUNCIL OF SRI LANKA
    Inventors: Chandhi S. Goonesekara, Vajira Seneviratne, D. Nedra Karunaratne, Veranja Karunaratne
  • Publication number: 20090048332
    Abstract: New antioxidants derived from lichen extracts are reported; lecanoric acid, erythrin, sekikaic acid, and lobaric acid were reported as potent natural antioxidants for the treatment of disease and protection of products from the effect of oxidizing components.
    Type: Application
    Filed: August 14, 2007
    Publication date: February 19, 2009
    Applicants: HEJ Research Insitute, University of Peradeniya
    Inventors: Muhammad Iqbal Choudhary, Sajjad Ali, Vinitha M Thadani, Veranja Karunaratne
  • Publication number: 20080318916
    Abstract: This invention is directed to a novel method for the inhibition of ?-glucosidase enzyme and thus treating diabetes, viral infections, fungal infections, autoimmune function disorders and obesity using compounds derived as lichen metabolites; more specifically, this includes the therapeutic applications of methylorsellinate (2,4-dihydroxy-6-methylbenzoate, Compound I), methyl-?-orinolcarboxylate (2,4-dihydroxy-3,6-dimethylbenzoate, Compound II) and zeorin (6,22-hopanediol, Compound III).
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Applicants: Department of Chemistry, University of Peradeniya, HEJ Research Institute
    Inventors: Vinitha Moolchand Thadani, Veranja Karunaratne, Muhammad Iqbal Choudhary