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).

  • 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
  • Patent number: 8080500
    Abstract: This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: December 20, 2011
    Assignee: King Industries, Inc.
    Inventors: Ramanathan Ravichandran, Farouk Abi-Karam, Alena Yermolenka, Michel Hourani, Ingo Roehrs
  • Patent number: 8030256
    Abstract: This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: October 4, 2011
    Assignee: King Industries, Inc.
    Inventors: Ramanathan Ravichandran, Farouk Abi-Karam, Alena Yermolenka, Michel Hourani, Ingo Roehrs
  • Patent number: 7820602
    Abstract: This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: October 26, 2010
    Assignee: King Industries, Inc.
    Inventors: Ramanathan Ravichandran, Farouk Abi-Karam, Alena Yermolenka, Michel Hourani, Ingo Roehrs
  • Patent number: 7572843
    Abstract: The invention relates to poly(vinylalcohol)-co-poly(vinylamine) copolymers represented as formula (I), where B is greater than or equal to 1, L is independently of each other a chemical linking group which is —NH—, —N?, >N—, >N++<, —O— or —CO—, COPOLYMER is derived from a prepolymer of the formula (II) where R1 and R3 are independently H; 3-propionic acid or C1,-C6 alkyl ester thereof; or is 2-methyl-3-propionic acid or C1-C6 alkyl ester thereof, R2 and R4 are independently H or C1,-C6 alkyl, x+y+z is between about 3 and about 50 mole percent and q, n and m together make up the remainder of the mole percent, the indices x, y, z, n, m -and q independently may be 0, if q is not 0, b may also be 0.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: August 11, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Walter L. Renz, Ramanathan Ravichandran, Andrew J. Naisby, Joseph Suhadolnik, Mervin Gale Wood, Rong Xiong
  • Patent number: 7531664
    Abstract: Novel flame retarding compounds that comprise at least one sterically hindered nitroxyl, hydroxylamine or hydrocarbyloxyamine moiety and at least one conventional organohalogen or organophosphorus flame retardant moiety, represented by where HA is independently of each other a sterically hindered nitroxyl, sterically hindered hydroxylamine or sterically hindered hydrocarbyloxyamine moiety, L is independently of each other a direct bond or chemical linking group, FRM is independently of each other an organohalogen or an organophosphorus flame retardant moiety, and x, y and z are each independently greater than or equal to 1, are especially effective towards providing flame retardancy to organic polymer substrates.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: May 12, 2009
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Malisa V. Troutman, Ramanathan Ravichandran, Redina Kote, Roswell E. King
  • Publication number: 20090104363
    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: October 2, 2008
    Publication date: April 23, 2009
    Inventors: Farouk Abi-Karam, Ramanathan Ravichandran, Raman Subrayan, Richard A. Abramshe
  • Patent number: 7485729
    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: July 17, 2006
    Date of Patent: February 3, 2009
    Assignee: King Industries, Inc.
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Farouk Abi-Karam
  • Publication number: 20090029888
    Abstract: This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
    Type: Application
    Filed: January 18, 2008
    Publication date: January 29, 2009
    Inventors: Ramanathan Ravichandran, Farouk Abi-Karam, Alena Yermolenka, Michel Hourani, Ingo Roehrs, Edward T. Hessell
  • Publication number: 20090011124
    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: September 18, 2008
    Publication date: January 8, 2009
    Inventors: Bing Hsieh, Ramanathan Ravichandran, Farouk Abi-Karam
  • Patent number: 7470734
    Abstract: Polymeric substrates, for example polyolefins such as polypropylene, can be made flame retardant by the incorporation therein of a synergistic mixture of (i.) at least one compound selected from the group consisting of nitroxyl stabilizers, hydroxylamine stabilizers, nitrone stabilizers, substituted hydroxylamine stabilizers, amine oxide stabilizers, benzofuranone stabilizers, phosphite and phosphonite stabilizers, quinone methide stabilizers and monoacrylate esters of 2,2?-alkylidenebisphenol stabilizers and (ii.) at least one compound selected from the group consisting of brominated flame retardants, phosphorus containing flame retardants and inorganic flame retardants such as ammonium polyphosphate or decabromodiphenyl oxide; wherein the amount of organic or inorganic flame retardant of component (ii.) required to achieve an acceptable level of flame retardancy is significantly reduced compared to that needed when component (i.) is not present.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: December 30, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Malisa V. Troutman, Ramanathan Ravichandran, Rangarajan Srinivsan, Roswell Easton King, Douglas Wayne Horsey
  • Publication number: 20080286430
    Abstract: A combination of one or more compounds selected from the group consisting of 3-arylbenzofuranones, long chain N,N-dialkylhydroxylamines, substituted hydroxylamines, nitrones, and amine oxides are highly effective antioxidants for use with edible organic substances subject to deterioration by oxidation.
    Type: Application
    Filed: July 30, 2008
    Publication date: November 20, 2008
    Inventors: Raymond Seltzer, Ramanathan Ravichandran
  • Patent number: 7419513
    Abstract: Compounds which have a benzotriazole and a hindered amine moiety in the same molecule are typified by the formula A wherein at least one of G2, R1 or R2 contains a hindered amine moiety are extremely effective light stabilizers having both the UV absorbing activity of a benzotriazole and the light stabilizing efficacy of a hindered amine in the same molecule. These compounds are effective stabilizers for thermoset resin compositions, thermoplastic resin compositions, for photographic applications, for pigmented or dyed polypropylene, polyamide or polyester fibers, and for white, dyed, dipped, unscented and/or scented candle wax against discoloration and fading when incorporated therein alone or in combination with an antioxidant.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: September 2, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Mervin G. Wood, Jacqueline Lau, Ramanathan Ravichandran, Andrea R. Smith, Joseph Suhadolnik, Peter Solera, Joseph S. Puglisi, Carmen Hendricks-Guy, Stephen D. Pastor, Luther A. R. Hall
  • Publication number: 20080194440
    Abstract: This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.
    Type: Application
    Filed: April 3, 2008
    Publication date: August 14, 2008
    Inventors: Ramanathan Ravichandran, Farouk Abi-Karam, Alena Yermolenka, Michel Hourani, Ingo Roehrs
  • Patent number: 7244776
    Abstract: The present invention relates to novel ultraviolet light absorbers of the benzoxazinone, oxanilide, benzylidene malonate, quinazoline and benzotriazole classes. The invention also relates to polymer and photographic compositions stabilized against the deleterious effects of light induced degradation which comprise the novel ultraviolet light absorbers.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: July 17, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Ramanathan Ravichandran, Stephen Daniel Pastor, Deborah Judd, Joseph Edmund Babiarz, Andrew Brian Naughton, Mervin Gale Wood, Anthony David Debellis, Rong Xiong, Robert Edward Detlefsen, Joseph Suhadolnik
  • Publication number: 20070160780
    Abstract: Disclosed are ink jet recording media systems that comprise poly(vinyl alcohol)-co-poly(N-vinyl formamide) copolymers of the formula wherein m is 0-15 mole percent, n is 50 to 99 mole percent and x is 1 to 50 mole percent.
    Type: Application
    Filed: March 8, 2007
    Publication date: July 12, 2007
    Inventors: Walter Renz, Ramanathan Ravichandran, Andrew Naisby, Joseph Suhadolnik, Mervin Wood, Rong Xiong
  • Patent number: 7214742
    Abstract: Compounds of the general formula I? in which R1 is H, C1–C12alkyl; C5–C12cycloalkyl; C2–C18alkyl which is interrupted by one or more O; SR4; OR5; or is a group of formula II or III R2, R21 and R3 independently of one another, are H or —Y—T as defined in claim 1, where T is a reactive group selected from OH, acryl- and methacryloxy and arylcarbonate groups, and further symbols are as defined in claim 1, are effective as crosslinking agents for polymeric networks, especially as in flexographic printing plates, coatings, and plastic containers or films. Further provided is a method of protecting the content of a clear or lightly colored plastic container or film against the deleterious effects of ultraviolet radiation, which method comprises permanently and covalently bonding one or more UV absorbing moieties of a durable s-triazine UV absorber via condensation to a suitable polymer component.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: May 8, 2007
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Thomas Bolle, Andreas Valet, David George Leppard, Stephen Mark Andrews, Ramanathan Ravichandran, Markus Grob, Dirk Simon