Patents by Inventor Waruna C.B. Kiridena

Waruna C.B. Kiridena 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).

  • Publication number: 20190389992
    Abstract: A nanoparticle includes a copolymer comprising a vinyl-aromatic monomer and a heterocyclic monomer. The copolymer is crosslinked with a multifunctional crosslinking agent polymerizable through an addition reaction. A nanoparticle and elastomer composition is disclosed. Several methods of mixing heterocyclic and non-heterocyclic monomer nanoparticles into an elastomer are also disclosed. These methods include mixing in a multi-elements static mixer and an intermeshing mixer with venting, among others.
    Type: Application
    Filed: September 9, 2019
    Publication date: December 26, 2019
    Inventors: William L. Hergenrother, Waruna C.B. Kiridena, James H. Pawlow, James D. Ulmer, Christopher G. Robertson, Michael C. David, Jeffrey D. Quinn
  • Patent number: 10407522
    Abstract: A nanoparticle includes a copolymer comprising a vinyl-aromatic monomer and a heterocyclic monomer. The copolymer is crosslinked with a multifunctional crosslinking agent polymerizable through an addition reaction. A nanoparticle and elastomer composition is disclosed. Several methods of mixing heterocyclic and non-heterocyclic monomer nanoparticles into an elastomer are also disclosed. These methods include mixing in a multi-elements static mixer and an intermeshing mixer with venting, among others.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: September 10, 2019
    Assignee: Bridgestone Corporation
    Inventors: William L. Hergenrother, Waruna C. B. Kiridena, James H. Pawlow, James D. Ulmer, Christopher G. Robertson, Michael Davis, Jeffrey Quinn
  • Patent number: 10202497
    Abstract: Methods are described for microwave extraction of a component from a rubber-containing plant by providing a container holding a mixture of a sample of the rubber-containing plant and a solvent, placing the container holding the mixture in a vessel, irradiating the mixture in the vessel to increase the temperature of the mixture to extract the component from the sample of the rubber-containing plant into the solvent, and separating the extracted component from the solvent to quantify the amount of the component in the sample. Methods are also described for quantifying the amount of natural rubber in a sample from a rubber-containing plant and quantifying the amount of resin in a sample from a rubber-containing plant.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: February 12, 2019
    Assignee: Bridgestone Corporation
    Inventors: Waruna C. B. Kiridena, Yingyi Huang
  • Publication number: 20180291152
    Abstract: A functionalized polyamide is prepared by reacting a thio acid with an amide monomer or a mixture of a diamine and a dicarboxylic acid. In the reaction, the amide monomer is preferably a lactam compound, the thio acid has a formula of HOOC-A-SH wherein A represents an alkylene group containing from 1 to 10 carbon atoms, the diamine is an aliphatic diamine and the dicarboxylic acid is a aliphatic dicarboxylic acid. The functionalized polyamide can be vulcanized directly with rubber, which results in the use of less dip for adhering the tire cord to the rubber.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 11, 2018
    Inventors: Laura S. Kocsis, William L. Hergenrother, Terrence E. Hogan, Kevin J. Bishop, Waruna C.B. Kiridena
  • Patent number: 10073067
    Abstract: Methods are described for determining the quality of dioctyltin bisoctylmaleate and selectively screening its use as a component or modifying agent in a polymer production process. The quality of dioctyltin bisoctylmaleate is determined by measuring the presence and intensity of by products or impurities contained in the dioctyltin bisoctylmaleate. The detected impurities are resolved by comparison to a baseline, such as a solubility limit, to make a decision if the dioctyltin bisoctylmaleate supply is within acceptable limits. Selectively using certain supplies of dioctyltin bisoctylmaleate having suitable limits of impurities, such as the solubility limit of dioctyltin maleate, polymer production efficiency, time and costs can be improved.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: September 11, 2018
    Assignee: Firestone Polymers, LLC
    Inventor: Waruna C. B. Kiridena
  • Publication number: 20180134815
    Abstract: An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Applicant: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C.B. Kiridena
  • Patent number: 9868795
    Abstract: An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 16, 2018
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C. B. Kiridena
  • Publication number: 20170073479
    Abstract: Methods are described for microwave extraction of a component from a rubber-containing plant by providing a container holding a mixture of a sample of the rubber-containing plant and a solvent, placing the container holding the mixture in a vessel, irradiating the mixture in the vessel to increase the temperature of the mixture to extract the component from the sample of the rubber-containing plant into the solvent, and separating the extracted component from the solvent to quantify the amount of the component in the sample. Methods are also described for quantifying the amount of natural rubber in a sample from a rubber-containing plant and quantifying the amount of resin in a sample from a rubber-containing plant.
    Type: Application
    Filed: September 9, 2016
    Publication date: March 16, 2017
    Inventors: Waruna C.B. Kiridena, Yingyi Huang
  • Patent number: 9428604
    Abstract: A nanoparticle includes a copolymer comprising a vinyl-aromatic monomer and a heterocyclic monomer. The copolymer is crosslinked with a multifunctional crosslinking agent polymerizable through an addition reaction. A nanoparticle and elastomer composition is disclosed. Several methods of mixing heterocyclic and non-heterocyclic monomer nanoparticles into an elastomer are also disclosed. These methods include mixing in a multi-elements static mixer and an intermeshing mixer with venting, among others.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 30, 2016
    Assignee: Bridgestone Corporation
    Inventors: William L. Hergenrother, Waruna C. B. Kiridena, James H. Pawlow, James D. Ulmer, Christopher G. Robertson, Michael Davis
  • Publication number: 20160237181
    Abstract: An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
    Type: Application
    Filed: March 24, 2016
    Publication date: August 18, 2016
    Applicant: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C. B. Kiridena
  • Patent number: 9309330
    Abstract: An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: April 12, 2016
    Assignee: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C. B. Kiridena
  • Publication number: 20150284483
    Abstract: An oxolanyl compound-containing composition comprising specified amounts of the meso-isomer of one or more of the oxolanyl compounds of specified structure is provided. Also provided are methods for the use of such compositions as vinyl content modifiers in polymerization processes.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 8, 2015
    Applicant: Bridgestone Corporation
    Inventors: Terrence E. Hogan, Waruna C.B. Kiridena