Patents by Inventor Nihal U. Obeyesekere

Nihal U. Obeyesekere 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).

  • Liquid inhibitor composition and a method for its preparation and application as a heavy brine corrosion control
    Patent number: 10611951
    Abstract: A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one imidazoline; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: April 7, 2020
    Assignee: Clariant International Ltd.
    Inventors: Nihal U. Obeyesekere, Thenuka Ariyaratna, Jonathan James Wylde
  • Use Of A Composition Containing At Least One Biodegradable Sugar-Amide-Compound In Combination With At Least One Sulfur-Based Synergist For Corrosion Inhibition Of A Metallic Equipment In Oilfield Applications
    Publication number: 20200017752
    Abstract: In this invention the use of glucamides in combination with at least one sulfur-based synergist chosen from the group of thiols, thioethers, thiosulfates, thioglycolic acids, thiourea or derivatives thereof in a formulation for corrosion inhibition in the gas and oil industry is described.
    Type: Application
    Filed: September 18, 2017
    Publication date: January 16, 2020
    Applicant: Clariant International Ltd.
    Inventors: Jonathan WYLDE, Nihal U. OBEYESEKERE, Thenuka ARIYARATNA, Dirk LEINWEBER, Franz-Xaver SCHERL
  • Liquid inhibitor composition and a method for its preparation and application as a heavy brine corrosion control
    Patent number: 10519360
    Abstract: A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one amidoamine; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: December 31, 2019
    Assignee: CLARIANT INTERNATIONAL LTD.
    Inventors: Nihal U. Obeyesekere, Thenuka Ariyaratna, Jonathan James Wylde
  • Liquid Inhibitor Composition And A Method For Its Preparation And Application As A Heavy Brine Corrosion Control
    Publication number: 20170342311
    Abstract: A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one amidoamine; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.
    Type: Application
    Filed: December 10, 2015
    Publication date: November 30, 2017
    Applicant: Clariant International, Ltd.
    Inventors: Nihal U. OBEYESEKERE, Thenuka ARIYARATNA, Jonathan James WYLDE
  • Liquid Inhibitor Composition And A Method For Its Preparation And Application As A Heavy Brine Corrosion Control
    Publication number: 20170342310
    Abstract: A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one imidazoline; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.
    Type: Application
    Filed: December 10, 2015
    Publication date: November 30, 2017
    Applicant: Clariant International, Ltd.
    Inventors: Nihal U. OBEYESEKERE, Thenuka ARIYARATNA, Jonathan James WYLDE
  • Corrosion inhibitors with low environmental toxicity
    Patent number: 6475431
    Abstract: A low toxic, biodegradable, water soluble and dispersant series of corrosion inhibitors are described. The method of inhibiting corrosion in aqueous medium by incorporating the inhibitor in PPM is provided. The corrosion inhibitor compromises an acrylic acid and chloroacetic acid adduct of 2-substituted imidazolines or primary, secondary or tertiary amines with carbon chain of twelve to twenty-two saturated or unsaturated carbon atoms. The molar ratio of acrylic acid to chloroacetic acid was methodically changed while keeping the concentration of imidazoline or the amine a constant. The product is made water soluble by raising the pH to 8-9 at the end of the synthesis by adding aqueous sodium hydroxide.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: November 5, 2002
    Assignee: Champion Technologies, Inc.
    Inventors: Ali Naraghi, Nihal U. Obeyesekere