Patents by Inventor Raja Krishnamurthy

Raja Krishnamurthy 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: 8691915
    Abstract: This disclosure relates generally to methods for the manufacture of transparent polymer compositions exhibiting refractive indices similar or even identical to the refractive index of polycarbonate. Also disclosed are polymer blends comprising the disclosed polymer compositions blended with one or more convention polycarbonate.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: April 8, 2014
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Rajiv Kumar Srivastava, James Louis DeRudder, Rajashakhar Totad, Robert Walter Venderbosch, Raja Krishnamurthy
  • Publication number: 20130281628
    Abstract: This disclosure relates generally to methods for the manufacture of transparent polymer compositions exhibiting refractive indices similar or even identical to the refractive index of polycarbonate. Also disclosed are polymer blends comprising the disclosed polymer compositions blended with one or more convention polycarbonate.
    Type: Application
    Filed: April 23, 2012
    Publication date: October 24, 2013
    Inventors: Rajiv Kumar Srivastava, James Louis DeRudder, Rajashakhar Totad, Robert Walter Venderbosch, Raja Krishnamurthy
  • Patent number: 7858680
    Abstract: Disclosed herein is a thermoplastic composition comprising: a polycarbonate; an impact modifier; a polycarbonate-polysiloxane copolymer; a poly(arylene ether)-polysiloxane copolymer; and an organophosphate in an amount of 2 to 20 weight percent based on the combined weight of polycarbonate, impact modifier, polycarbonate-polysiloxane copolymer, and poly(arylene ether)-polysiloxane copolymer, wherein the composition has a notched Izod impact strength of greater than or equal to 4 kilojoules per square meter (kJ/m2) as determined according to ISO 180/A, a melt viscosity rate of less than or equal to 130 Pascal seconds (Pa·s) as determined according to ISO11443 at 1500 s?1 and 280° C., and a UL94 rating of V1 or better at 0.8 millimeter thickness.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: December 28, 2010
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Vitthal Abaso Sawant, Srinivas Siripurapu, Raja Krishnamurthy, Sandeep Tyagi
  • Publication number: 20100280176
    Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites. Also disclosed are polycarbonate compositions comprising the nanomaterial.
    Type: Application
    Filed: July 14, 2010
    Publication date: November 4, 2010
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Amit Biswas, Dibakar Dhara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Rai, Vaidyanath Ramakrishnan, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
  • Publication number: 20100168293
    Abstract: Disclosed herein is a thermoplastic composition comprising: a polycarbonate; an impact modifier; a polycarbonate-polysiloxane copolymer; a poly(arylene ether)-polysiloxane copolymer; and an organophosphate in an amount of 2 to 20 weight percent based on the combined weight of polycarbonate, impact modifier, polycarbonate-polysiloxane copolymer, and poly(arylene ether)-polysiloxane copolymer, wherein the composition has a notched Izod impact strength of greater than or equal to 4 kilojoules per square meter (kJ/m2) as determined according to ISO 180/A, a melt viscosity rate of less than or equal to 130 Pascal seconds (Pa·s) as determined according to ISO11443 at 1500 s?1 and 280° C., and a UL94 rating of V1 or better at 0.8 millimeter thickness.
    Type: Application
    Filed: December 29, 2008
    Publication date: July 1, 2010
    Inventors: Vitthal Abaso Sawant, Srinivas Siripurapu, Raja Krishnamurthy, Sandeep Tyagi
  • Patent number: 7649057
    Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a polyorganosiloxane has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: January 19, 2010
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: James Louis DeRudder, Raja Krishnamurthy, Rajashekhar Shiddappa Totad, Sandeep Tyagi, Robert Walter Venderbosch
  • Patent number: 7557154
    Abstract: A polymer composition is disclosed, which comprises a matrix polymer, a fluoropolymer that may be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the polymer compositions and articles made of such compositions are also disclosed. The compositions and article can have improved tensile modulus, ductility, and/or impact properties.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: July 7, 2009
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Naveen Agarwal, Satish Kumar Gaggar, Deval Gupta, Samik Gupta, Raja Krishnamurthy, Nisha Preschilla, Rajashekhar Shiddappa Totad, Sandeep Tyagi
  • Publication number: 20090170998
    Abstract: Disclosed herein is a thermoplastic composition comprising about 49.9 to about 99.9 parts by weight of a polycarbonate polymer, up to about 50 parts by weight of an impact modifier, and about 0.1 to about 30 parts by weight silicon carbide particles, wherein the amounts of the polycarbonate polymer, impact modifier, and silicon carbide are each based on 100 parts by weight of the polycarbonate, silicon carbide particles, and impact modifier, wherein the thermoplastic composition has a melt volume rate (MVR) of greater than or equal to 5 cc/10 min. when measured at a temperature of 300° C. under a load of 1.2 kg according to ISO 1133, and wherein an article molded from the thermoplastic composition has a notched Izod impact (NII) of greater than or equal to 4 kJ/m2, when measured at a temperature of 23° C. and using a 2.7 J hammer, according to ISO 180. A method of making the composition, and articles formed therefrom, are also claimed.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Inventors: Deval Gupta, Raja Krishnamurthy, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
  • Publication number: 20080167414
    Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites. Also disclosed are polycarbonate compositions comprising the nanomaterial.
    Type: Application
    Filed: August 29, 2007
    Publication date: July 10, 2008
    Inventors: Amit Biswas, Dibakar Dbara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Raj, Vaidyanath Ramakrishnan, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
  • Publication number: 20080081865
    Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 3, 2008
    Inventors: Amit Biswas, Dibakar Dhara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Rai, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
  • Publication number: 20070282052
    Abstract: A composition comprises a poly(arylene ether); a block copolymer comprising a first block and a second block wherein the first block comprises repeating aryl alkylene units and the second block comprises repeating alkylene units; and an ethylene-vinyl aliphatic acid copolymer wherein the poly(arylene ether) and the block copolymer form a dual phase co-continuous morphology.
    Type: Application
    Filed: June 6, 2006
    Publication date: December 6, 2007
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Anil K. Bhowmick, Amit Biswas, Samik Gupta, Raja Krishnamurthy, Nisha Preschilla
  • Publication number: 20070135570
    Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a functional copolymer has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Applicant: General Electric Company
    Inventors: Raja Krishnamurthy, Rajashekhar Totad, Sandeep Tyagi
  • Publication number: 20070135589
    Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a polyorganosiloxane has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Applicant: General Electric Company
    Inventors: James DeRudder, Raja Krishnamurthy, Rajashekhar Totad, Sandeep Tyagi, Robert Venderbosch
  • Publication number: 20060142455
    Abstract: A polymer composition is disclosed, which comprises a matrix polymer, a fluoropolymer that may be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the polymer compositions and articles made of such compositions are also disclosed. The compositions and article can have improved tensile modulus, ductility, and/or impact properties.
    Type: Application
    Filed: December 23, 2004
    Publication date: June 29, 2006
    Inventors: Naveen Agarwal, Satish Gaggar, Deval Gupta, Samik Gupta, Raja Krishnamurthy, Nisha Preschilla, Rajashekhar Totad, Sandeep Tyagi
  • Patent number: 6951301
    Abstract: A combination closure tape and tear strip, an object comprising the combination closure tape and tear strip, and a method of sealing and later opening said object utilizing the combination closure tape and tear strip are disclosed.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: October 4, 2005
    Assignee: tesa Aktiengesellschaft
    Inventors: Ronald Edmund Miaskiewicz, Jr., Raja Krishnamurthy
  • Publication number: 20050143508
    Abstract: A thermoplastic resin composition is disclosed which comprises a matrix polymer, and a combination of a fluoropolymer that can be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the thermoplastic resin composition and articles made of such compositions are also disclosed. The composition and article can have improved tensile modulus, ductility and impact properties.
    Type: Application
    Filed: December 30, 2003
    Publication date: June 30, 2005
    Inventors: Sandeep Tyagi, Deval Gupta, Raja Krishnamurthy, Rajashekhar Totad, Satish Gaggar
  • Publication number: 20040041013
    Abstract: The specification and drawings describe and show embodiments of the present invention in the form of a combination closure tape and tear strip, an object comprising the combination closure tape and tear strip, and a method of sealing and later opening said object utilizing the combination closure tape and tear strip. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to ascertain quickly the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR § 1.72(b).
    Type: Application
    Filed: February 5, 2003
    Publication date: March 4, 2004
    Inventors: Ronald Edmund Miaskiewicz Jr, Raja Krishnamurthy