Patents by Inventor Indumathi Ramakrishnan

Indumathi Ramakrishnan 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: 9434820
    Abstract: Thermoplastic resin polymer compositions having a block of random polysiloxane co- or terpolymer structure, such as substituted phenyl-terminated polysiloxane co- or terpolymers having the general structure: provide improved flame resistance, optical clarity, and better low-temperature impact strength compared to conventional blends, additives, and copolymers. The substituted phenyl terminated polysiloxanes may be used to make various polysiloxane-thermoplastic resin polymer and polymer blends, as well as articles including such polysiloxane-thermoplastic resin polymer and blends.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: September 6, 2016
    Assignee: Momentive Performance Material Inc.
    Inventors: Anuj Mittal, Narayan Padmanabha Iyer, Samim Alam, Indumathi Ramakrishnan, Roy U. Rojas-Wahl
  • Patent number: 9428617
    Abstract: An ?,?-functionalized polyoxyalkylene-siloxane polymer having the general structural Formula (I): provides improved hydrophilicity and hemocompatibility. The ?,?-functionalized polyoxyalkylene-siloxane polymer may be used to make various polycarbonate/?,?-functionalized polyoxyalkylene-siloxane copolymers and polymer blends, as well as articles including such copolymers and blends.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 30, 2016
    Assignee: Momentive Performance Material Inc.
    Inventors: Anuj Mittal, Laxmi Samantara, Samim Alam, Anubhav Saxena, Indumathi Ramakrishnan, Roy U. Rojas-Wahl
  • Publication number: 20160244571
    Abstract: There is provided herein a curable polysiloxane composition comprising a reactive polysiloxane having the general structural formula (I): as described herein. There is provided a method of making the polysiloxane. In addition there is provided a curable composition including the polysiloxane.
    Type: Application
    Filed: February 24, 2016
    Publication date: August 25, 2016
    Inventors: Anuj Mittal, Raveendra Mathad, Sumi Dinkar, Indumathi Ramakrishnan, Manav Gupta
  • Patent number: 9376534
    Abstract: The invention is directed to phenyl-containing functional polysiloxanes and polycarbonate-polysiloxane copolymer compositions made therefrom having improved optical clarity and better low temperature impact resistance.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 28, 2016
    Assignee: Momentive Performance Materials Japan LLC
    Inventors: Koji Kanuma, Yataka Horie, Anuj Mittal, Laxmi Samantara, Indumathi Ramakrishnan, Naofumi Kumabe, Narayana Padmanabha Iyer, Samim Alam
  • Patent number: 9334372
    Abstract: There is provided herein a polysiloxane having the general structural formula (I): as described herein. In addition there is provided a copolymer including the polysiloxane, a composition including such a copolymer and another polymer, a method of making the same and articles therefrom.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: May 10, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: Anuj Mittal, Samim Alam, Raveendra Mathad, Indumathi Ramakrishnan, Roy Rojas-Wahl
  • Publication number: 20160083528
    Abstract: An ?,?-functionalized polyoxyalkylene-siloxane polymer having the general structural Formula (I): provides improved hydrophilicity and hemocompatibility. The ?,?-functionalized polyoxyalkylene-siloxane polymer may be used to make various polycarbonate/?,?-functionalized polyoxyalkylene-siloxane copolymers and polymer blends, as well as articles including such copolymers and blends.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 24, 2016
    Inventors: Anuj Mittal, Laxmi Samantara, Samim Alam, Anubhav Saxena, Indumathi Ramakrishnan, Roy U. Rojas-Wahl
  • Publication number: 20160083527
    Abstract: Thermoplastic resin polymer compositions having a block of random polysiloxane co- or terpolymer structure, such as substituted phenyl-terminated polysiloxane co- or terpolymers having the general structure: provide improved flame resistance, optical clarity, and better low-temperature impact strength compared to conventional blends, additives, and copolymers. The substituted phenyl terminated polysiloxanes may be used to make various polysiloxane-thermoplastic resin polymer and polymer blends, as well as articles including such polysiloxane-thermoplastic resin polymer and blends.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 24, 2016
    Inventors: Anuj Mittal, Narayan Padmanabha Iyer, Samim Alam, Indumathi Ramakrishnan, Roy U. Rojas-Wahl
  • Publication number: 20160002410
    Abstract: There is described a polysiloxane having the structure: wherein R1, R2, and R3 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical, R4 is independently a direct bond or hydrocarbon radical optionally substituted with oxygen and nitrogen, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300; y is from 0 to 50; and z is from 0 to 50. The polysiloxane is used to make various copolymers and polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 7, 2016
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
  • Publication number: 20160002412
    Abstract: Disclosed herein is a polyorganosiloxane having the structure of Formula I: wherein, R1 and R2 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical. R3 is an organic UV absorbing group, R4 independently is a direct bond, hydrocarbon radical optionally substituted with oxygen and nitrogen, or a group of Formula II(a) or Formula II(b) wherein A and B are a hydrocarbon radical, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300, y is from 0 to 50 and z is from 1 to 50. The polyorganosiloxane is used to make various copolymers or polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 7, 2016
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Roy Rojas-Wahl, Samim Alam
  • Patent number: 9200160
    Abstract: There is provided herein a composition comprising: (A) a silanol and/orhydrocarbon-terminated polyorganosiloxane in an amount of from about 30 weight percent to about 90 weight percent; and, (B) a moisture curable silylated polyurethane resin in an amount of from about 10 weight percent to about 70 weight percent. There is also provided herein in another embodiment a two part sealant composition wherein the first part comprises: (A) a silanol and/or hydrocarbon-terminated polyorganosiloxane in an amount of from about 15 weight percent to about 60 weight percent, (B) a moisture curable silylated polyurethane resin in an amount of from about 2 weight percent to about 32 weight percent, and (C) a filler, said weight percents being based on the weight of the first part.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: December 1, 2015
    Assignee: Momentive Performance Materials Inc.
    Inventors: Indumathi Ramakrishnan, Shayne Joseph Landon, David A. Williams, Anantharaman Dhanabalan
  • Publication number: 20150159036
    Abstract: The present invention is directed to a primer composition, comprising: (a) metal oxide nanoparticles surface-modified with an organofunctional silane moiety having a specific functionality, (b) an organic polymer; and (c) one or more solvents; wherein the composition comprises less than 4 wt % of water, based on the total weight of said primer composition. The composition produces films having excellent optical and adhesion characteristics, and excellent weatherability and thermal stability.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 11, 2015
    Applicant: Momentive Performance Materials Inc.
    Inventors: Karthikeyan Murugesan, Indumathi Ramakrishnan, Robert F. Hayes, Keith J. Weller
  • Publication number: 20130338606
    Abstract: In one aspect, a self-lubricating component is provided for a pharmaceutical packaging assembly. The self-lubricating component comprises a polymer composition and an effective amount of a lubricating additive such as, for example, boron nitride. In another aspect, a pharmaceutical packaging assembly may be provided having a surface thereof coated with a lubricating composition comprising boron nitride. The pharmaceutical packaging composition may be, for example, a pre-filled syringe comprising a body (barrel) and a plunger assembly.
    Type: Application
    Filed: August 16, 2013
    Publication date: December 19, 2013
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Samuel Conzone, David M. Rusinko, Chandrashekar Raman, Indumathi Ramakrishnan, Anantharaman Dhanabalan, Mayank Kumar Dubey, Markus Bley, Hans Rafael Winkelbach
  • Patent number: 8597741
    Abstract: The invention relates to an insulated glass unit having an increased service life. An outer glass pane and inner glass pane are sealed to a spacer to provide an improved gas impermeable space. The glass unit includes a curable two-part sealer composition which, upon curing, exhibits unexpectedly high adhesion to substrates.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: December 3, 2013
    Assignee: Momentive Performance Materials Inc.
    Inventors: Shayne J. Landon, David A. Williams, Vikram Kumar, Sachin A. Shelukar, Edward J. Nesakumar, Indumathi Ramakrishnan
  • Patent number: 8530536
    Abstract: In one aspect, a self-lubricating component is provided for a pharmaceutical packaging assembly. The self-lubricating component comprises a polymer composition and an effective amount of a lubricating additive such as, for example, boron nitride. In another aspect, a pharmaceutical packaging assembly may be provided having a surface thereof coated with a lubricating composition comprising boron nitride. The pharmaceutical packaging composition may be, for example, a pre-filled syringe comprising a body (barrel) and a plunger assembly.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: September 10, 2013
    Inventors: Samuel D. Conzone, David M. Rusinko, Chandrashekar Raman, Indumathi Ramakrishnan, Anantharaman Dhanabalan, Mayank Kumar Dubey, Sumi Dinkar, Mayanglambam Rebika Devi, Markus Bley
  • Patent number: 8501856
    Abstract: The invention relates to curable, storage-stable silicon-containing compositions reinforced with functionalized silica useful as one and two-part sealant and adhesive systems. The cured compositions provide silicon-containing rubber having excellent translucency, physical properties and primerless adhesion.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: August 6, 2013
    Assignee: Momentive Performance Materials Inc.
    Inventors: Reuben Correia, Abirami Srikanth, Indumathi Ramakrishnan, Shayne Landon, Vikram Kumar
  • Patent number: 8257805
    Abstract: The invention relates to a high thermal efficiency, insulated glass unit structure sealed with a cured composition containing, inter alia, diorganopolysiloxane(s) and organic nanoclay(s), the cured composition exhibiting low permeability to gas(es).
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: September 4, 2012
    Assignee: Momentive Performance Materials Inc.
    Inventors: Shayne J. Landon, David A. Williams, Vikram Kumar, Edward J. Nesakumar, Indumathi Ramakrishnan
  • Patent number: 8217107
    Abstract: The present invention relates to room-temperature curable silicone compositions possessing rapid deep-section cure. The silicone sealant compositions of the present invention find application in insulating glass units as elements of windows, skylights, doors and related products.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: July 10, 2012
    Assignee: Momentive Performance Materials Inc.
    Inventors: Indumathi Ramakrishnan, Edward Joseph Nesakumar
  • Publication number: 20120065595
    Abstract: In one aspect, a self-lubricating component is provided for a pharmaceutical packaging assembly. The self-lubricating component comprises a polymer composition and an effective amount of a lubricating additive such as, for example, boron nitride. In another aspect, a pharmaceutical packaging assembly may be provided having a surface thereof coated with a lubricating composition comprising boron nitride. The pharmaceutical packaging composition may be, for example, a pre-filled syringe comprising a body (barrel) and a plunger assembly.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 15, 2012
    Inventors: Samuel D. Conzone, David M. Rusinko, Chandrashekar Raman, Indumathi Ramakrishnan, Anantharaman Dhanabalan, Mayank Kumar Dubey, Sumi Dinkar, Mayanglambam Rebika Devi, Markus Bley
  • Publication number: 20110237734
    Abstract: There is provided herein a composition comprising: (A) a silanol and/orhydrocarbon-terminated polyorganosiloxane in an amount of from about 30 weight percent to about 90 weight percent; and, (B) a moisture curable silylated polyurethane resin in an amount of from about 10 weight percent to about 70 weight percent. There is also provided herein in another embodiment a two part sealant composition wherein the first part comprises: (A) a silanol and/or hydrocarbon-terminated polyorganosiloxane in an amount of from about 15 weight percent to about 60 weight percent, (B) a moisture curable silylated polyurethane resin in an amount of from about 2 weight percent to about 32 weight percent, and (C) a filler, said weight percents being based on the weight of the first part.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 29, 2011
    Applicant: Momentive Performance Materials Inc.
    Inventors: Indumathi Ramakrishnan, Shayne Joseph Landon, David A. Williams, Anantharaman Dhanabalan
  • Patent number: 7993754
    Abstract: The invention relates to architectural elements possessing at least two components bonded together employing a silicone rubber composition possessing rapid development of strength and deep-section cure, which is useful for application as a bedding sealant in the manufacture of such architectural elements as window assemblies, door assemblies, structural glazing, curtainwall applications, and the like.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: August 9, 2011
    Assignee: Momentive Performance Materials Inc.
    Inventors: Indumathi Ramakrishnan, Edward Joseph Nesakumar