Patents by Inventor Ramanathan Ravichandran

Ramanathan Ravichandran 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: 20210035704
    Abstract: Provided are methods for extending the life of in-service electrical cable having polymeric insulation, comprising injecting into the cable a dielectric gel formulation containing: (a) Si—H endblocked polydiorganosiloxane (H(R2SiO)x(R2Si)H); (b) polydiorganosiloxane endblocked with unsaturated carbon-carbon functionality; (c) hydrosilylation catalyst suitable to cure (a) and (b); and (d) at least one organoalkoxysilane functional additive (e.g., anti-oxidant-based alkoxysilane, voltage stabilizer-based alkoxysilane, hindered amine light stabilizer (HALS)-based alkoxylsilane, UV absorber-based alkoxysilane, etc.), wherein (a) and (b) are cured post-injection into a non-flowable gel, and wherein (d) diffuses into the insulation. The methods may further comprise a hydrolysis/condensation catalyst compatible with the hydrosilylation catalyst so as not to interfere with the cure of (a), (b) and (c), and/or be compatible with optional siloxane crosslinkers, and/or with optional hydrosilylation inhibitors.
    Type: Application
    Filed: July 15, 2020
    Publication date: February 4, 2021
    Inventors: Glen J. Bertini, David C. Busby, Ramanathan Ravichandran, Miles J. Hutchings
  • Publication number: 20210017384
    Abstract: Provided are methods for extending the life of in-service electrical cable having polymeric insulation, comprising injecting a dielectric enhancement fluid composition into the cable, wherein the composition comprises: (a) one or more organoalkoxysilane functional additives (voltage stabilizer-based, hindered amine light stabilizer (HALS)-based, and/or UV absorber-based); and (b) a catalyst suitable to catalyze hydrolysis and condensation of (a), the injected composition providing for rapid initial permeation of (a) into the insulation, and extended retention of subsequent condensation products of (a) in the insulation. Additionally provided are innovative silyl functional ferrocenes (e.g., containing a ferrocene moiety and a silyl function hydrolysable to silanol) having utility as functional voltage stabilizing additives in the methods.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 21, 2021
    Inventors: Glen J. Bertini, David C. Busby, Ramanathan Ravichandran, Miles J. Hutchings
  • Patent number: 10640641
    Abstract: There is a tin-free curable composition having (A) one or more organic polymers having a reactive-silicon-containing group, wherein at least one polymer has a main chain skeleton selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers, and (meth)acrylic acid ester polymers; (B) from 0.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: May 5, 2020
    Assignee: King Industries
    Inventors: Ramanathan Ravichandran, John Florio, Bing Hsieh, David P. Switala
  • Publication number: 20200062953
    Abstract: There is a tin-free curable composition having (A) one or more organic polymers having a reactive-silicon-containing group, wherein at least one polymer has a main chain skeleton selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers, and (meth)acrylic acid ester polymers; (B) from 0.
    Type: Application
    Filed: November 4, 2019
    Publication date: February 27, 2020
    Inventors: Ramanathan RAVICHANDRAN, John FLORIO, Bing HSIEH, David P. SWITALA
  • Publication number: 20180237635
    Abstract: There is a tin-free curable composition having (A) one or more organic polymers having a reactive-silicon-containing group, wherein at least one polymer has a main chain skeleton selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers, and (meth)acrylic acid ester polymers; (B) from 0.
    Type: Application
    Filed: April 19, 2018
    Publication date: August 23, 2018
    Inventors: Ramanathan RAVICHANDRAN, John FLORIO, Bing HSIEH, David P. SWITALA
  • Patent number: 10023764
    Abstract: Described are coating material compositions comprising an isocyanate group-containing component, a hydroxyl group-containing component, and a zinc (1-methylimidazole)bis(2-ethylhexanoate) complex. Also described is the use of a zinc (1-methylimidazole)bis(2-ethylhexanoate) complex as a catalyst system for the urethane reaction in coating material compositions.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: July 17, 2018
    Assignee: BASF Coatings GmbH
    Inventors: Bing Hsieh, Robert D. Coughlin, Ramanathan Ravichandran, Farouk Abi-Karam, Elke Westhoff, Peter Hoffmann, Bernadette Möller, Benedikt Schnier
  • Patent number: 9976055
    Abstract: Select metal salts of mono and di aromatic sulfonic acids and aliphatic sulfonic acids are effective latent acid catalysts in coating compositions capable of acid catalyzed crosslinking and provide coating compositions with lower cure temperature and quicker cure times than encountered with conventional sulfonic acid catalysts, have excellent storage stability and avoid drawbacks of epoxy and amine blocked sulfonic acid catalysts.
    Type: Grant
    Filed: January 10, 2015
    Date of Patent: May 22, 2018
    Assignee: King Industries
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Robert Coughlin, Farouk Abi-Karam, Marvin Blair
  • Patent number: 9976028
    Abstract: There is a tin-free curable composition having (A) one or more organic polymers having a reactive-silicon-containing group, wherein at least one polymer has a main chain skeleton selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers, and (meth)acrylic acid ester polymers; (B) from 0.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 22, 2018
    Assignee: King Industries
    Inventors: Ramanathan Ravichandran, John Florio, Bing Hsieh, David P. Switala
  • Publication number: 20160244606
    Abstract: There is a tin-free curable composition having (A) one or more organic polymers having a reactive-silicon-containing group, wherein at least one polymer has a main chain skeleton selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers, and (meth)acrylic acid ester polymers; (B) from 0.
    Type: Application
    Filed: February 22, 2016
    Publication date: August 25, 2016
    Inventors: Ramanathan RAVICHANDRAN, John FLORIO, Bing HSIEH, David P. SWITALA
  • Publication number: 20150197665
    Abstract: Select metal salts of mono and di aromatic sulfonic acids and aliphatic sulfonic acids are effective latent acid catalysts in coating compositions capable of acid catalyzed crosslinking and provide coating compositions with lower cure temperature and quicker cure times than encountered with conventional sulfonic acid catalysts, have excellent storage stability and avoid drawbacks of epoxy and amine blocked sulfonic acid catalysts.
    Type: Application
    Filed: January 10, 2015
    Publication date: July 16, 2015
    Applicant: KING INDUSTRIES
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Robert Coughlin, Farouk Abi-Karam, Marvin Blair
  • Patent number: 9006316
    Abstract: The present invention is directed to novel organometallic complexes as catalysts for the reaction of compounds with isocyanate and hydroxyl functional groups to form urethane and/or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zinc(II) with substituted amidines. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: April 14, 2015
    Assignee: King Industries, Inc.
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Farouk Abi-Karam
  • Publication number: 20150099678
    Abstract: Provided herein is are low viscosity, low volatility lubricant oil compositions comprising a first base oil component comprising, for example, alkylated naphthalenes, and a second base oil component wherein the composition has a kinematic viscosity at 100° C. of 7.6 cSt or less, a Noack volatility at 250° C. of less than 10%, and a viscosity index of at least 90 for use as internal combustion engine oils, such as compression- and spark-ignition engine oils.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 9, 2015
    Inventors: Farouk Abi-Karam, Richard A. Abramshe, Ramanathan Ravichandran, Angela C. Bylo
  • Publication number: 20150018197
    Abstract: Described are coating material compositions comprising an isocyanate group-containing component, a hydroxyl group-containing component, and a zinc (1-methylimidazole)bis(2-ethylhexanoate) complex. Also described is the use of a zinc (1-methylimidazole)bis(2-ethylhexanoate) complex as a catalyst system for the urethane reaction in coating material compositions.
    Type: Application
    Filed: January 24, 2013
    Publication date: January 15, 2015
    Inventors: Bing Hsieh, Robert D. Coughlin, Ramanathan Ravichandran, Farouk Abi-Karam, Eike Westhoff, Peter Hoffmann, Bernadette Möller, Benedikt Schnier
  • Patent number: 8912113
    Abstract: Described herein are metal amidine complexes in combination with a second compound useful as catalysts in a number of polymerization reactions, including polyurethane and epoxy polymerization reactions. Also described herein are various coating compositions and methods of using same for coating substrates using the metal amidine complexes in combination with a second compound.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: December 16, 2014
    Assignee: King Industries, Inc.
    Inventors: Ramanathan Ravichandran, Robert Coughlin, Bing Hsieh, Farouk Abi-Karam, John Florio
  • Publication number: 20140234224
    Abstract: Provided are compositions containing an emulsion containing a perfluorinated compound, as well as methods for preparation of the compositions. Also provided are formulations containing a complex of oxygen-17 and the emulsion compositions. Additionally provided are methods for the preparation of the formulations as well as kits containing the formulations. Further provided are methods of use of the formulations in imaging of tissues using a magnetic resonance imaging system.
    Type: Application
    Filed: September 22, 2012
    Publication date: August 21, 2014
    Applicant: ROCKLAND TECHNIMED, LTD.
    Inventors: Pradeep M. Gupte, Robert L. DeLaPaz, Ramanathan Ravichandran
  • Publication number: 20130216723
    Abstract: The present invention is directed towards novel sulfonic acid esters as catalysts for crosslinking of polymers having hydroxyl, carboxyl, and amide functional groups with a crosslinking agent and resin compositions containing the same. The present invention provides polymeric film coatings which have superior hardness, impact resistance, adhesion, improved blister resistance, salt spray characteristics and flexibility. These catalysts are especially effective in coil primer formulations containing calcium ion exchange anticorrosive pigments, where traditional blocked acid catalysts are ineffective.
    Type: Application
    Filed: March 21, 2013
    Publication date: August 22, 2013
    Applicant: King Industries
    Inventors: Farouk Abi-Karam, Ramanathan Ravichandran, Raman Subrayan, Richard A. Abramshe
  • Patent number: 8431730
    Abstract: The present invention is directed towards novel sulfonic acid esters as catalysts for crosslinking of polymers having hydroxyl, carboxyl, and amide functional groups with a crosslinking agent and resin compositions containing the same. The present invention provides polymeric film coatings which have superior hardness, impact resistance, adhesion, improved blister resistance, salt spray characteristics and flexibility. These catalysts are especially effective in coil primer formulations containing calcium ion exchange anticorrosive pigments, where traditional blocked acid catalysts are ineffective.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: April 30, 2013
    Assignee: King Industries
    Inventors: Farouk Abi-Karam, Ramanathan Ravichandran, Raman Subrayan, Richard A. Abramshe
  • Publication number: 20120225982
    Abstract: Described herein are metal amidine complexes in combination with a second compound useful as catalysts in a number of polymerization reactions, including polyurethane and epoxy polymerization reactions. Also described herein are various coating compositions and methods of using same for coating substrates using the metal amidine complexes in combination with a second compound.
    Type: Application
    Filed: March 5, 2012
    Publication date: September 6, 2012
    Inventors: Ramanathan Ravichandran, Robert Coughlin, Bing Hsieh, Farouk Abi-Karam, John Florio
  • Publication number: 20120070569
    Abstract: The present invention is directed to novel organometallic complexes as catalysts for the reaction of compounds with isocyanate and hydroxyl functional groups to form urethane and/or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zinc(II) with substituted amidines. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications.
    Type: Application
    Filed: November 23, 2011
    Publication date: March 22, 2012
    Applicant: KING INDUSTRIES, INC.
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Farouk Abi-Karam
  • Patent number: 8088846
    Abstract: The present invention is directed to novel organometallic complexes as catalysts for the reaction of compounds with isocyanate and hydroxyl functional groups to form urethane and/or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zinc(II) with substituted amidines. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: January 3, 2012
    Assignee: King Industries, Inc.
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Farouk Abi-Karam