Patents by Inventor Nirupama Kenkare

Nirupama Kenkare 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: 20190390058
    Abstract: Described herein are foam materials comprising a blend of a poly(biphenyl ether sulfone) (PPSU) and a polyethersulfone polymer (PES) with improved compressive strength and impact performance, a method for their formation, and articles comprising said foam materials for use in various lightweight applications such as transport and building materials.
    Type: Application
    Filed: January 11, 2018
    Publication date: December 26, 2019
    Inventors: Nirupama KENKARE, Kermit S. KWAN, William W. LOONEY, Mohammad Jamal EL-HIBRI, Vijay GOPALAKRISHNAN, Jason RICH
  • Patent number: 9969854
    Abstract: A foamable composition comprising from 60 to 99.88% by weight (% wt.) of at least one poly(aryl ether sulfone), from 0.10 to 10.00% by weight (% wt.) of at least one olefinic polymer, from 0.01 to 5.00% by weight (% wt.) of at least one tetrazole compound and from 0.01 to 2.50% by weight (% wt.) of at least one additive selected from the group of titanium dioxide (TiO2), clays, talc, silicates, silica, aluminates, barites, titanates, borates, nitrides, carbon-based materials or combinations thereof, all % wt. are relative to the total weight of the composition (C). Foam materials made from said foamable compositions and articles made from said foam materials.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: May 15, 2018
    Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: Nirupama Kenkare, Kermit S. Kwan
  • Publication number: 20170349699
    Abstract: Described herein are polyphenylene fibers. The polyphenylene fibers have one or more polyphenylene polymers. The polyphenylene fibers can further include one or more poly(aryl ether sulfone) polymers. In some embodiments, the polyphenylene fibers can have an average diameter that is less than about 1 micron. The polyphenylene fibers can have desirable mechanical properties. Also described herein are methods for forming polyphenylene fibers. In some embodiments, the fibers can be fabricated using specifically engineered polymer solutions in conjunctions with adapted force spinning techniques.
    Type: Application
    Filed: November 10, 2015
    Publication date: December 7, 2017
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: David Blake ROLLER, Mohammad Jamal EL-HIBRI, Nirupama KENKARE, DeeDee SMITH
  • Patent number: 9650485
    Abstract: A foam material made from a composition [composition (C)] comprising at least one high temperature poly(aryl ether sulfone) (PAESHT) polymer characterized in that the PAES polymer comprises from 1 to 99% by weight amount of at least one recurring unit (RPAES) [(RPAES?1)]) based on the total amount of recurring units, and from 1 to 99% by weight amount of at least one recurring unit (RPAES) [(RPAES?2)], based on the total amount of recurring units, and wherein said (RPAES?2) recurring unit is different from the (RPAES?1) recurring unit.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: May 16, 2017
    Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC.
    Inventors: Mohammad Jamal El-Hibri, Nirupama Kenkare, Kermit S. Kwan, William Walter Looney
  • Publication number: 20170022344
    Abstract: A foamable composition comprising from 60 to 99.88% by weight (% wt.) of at least one poly(aryl ether sulfone), from 0.10 to 10.00% by weight (% wt.) of at least one olefinic polymer, from 0.01 to 5.00% by weight (% wt.) of at least one tetrazole compound and from 0.01 to 2.50% by weight (% wt.) of at least one additive selected from the group of titanium dioxide (Ti02), clays, talc, silicates, silica, aluminates, barites, titanates, borates, nitrides, carbon-based materials or combinations thereof, all % wt. are relative to the total weight of the composition (C). Foam materials made from said foamable compositions and articles made from said foam materials.
    Type: Application
    Filed: December 18, 2014
    Publication date: January 26, 2017
    Inventors: Nirupama Kenkare, Kermit S. Kwan
  • Publication number: 20160060414
    Abstract: A method for manufacturing a thermoformed a polyetherimide/poly(biphenyl ether sulfone) foam article which comprises following three steps: Step 1. preparing a polyetherimide (PEI)/poly(biphenyl ether sulfone) (P2) foamable composition [composition (FP)], wherein said composition (FP) comprises PEI in an amount ranging from 0.1% weight (% wt.) to 99.9% wt., based on the total weight of the PEI and the poly(biphenyl ether sulfone) (P2), Step 2. foaming the composition (FP) to yield a foamed (PEI)/poly(biphenyl ether sulfone) material [foam (P) material], and Step 3. molding said foam (P) material under the effect of heat and pressure to provide a thermoformed foamed article.
    Type: Application
    Filed: April 14, 2014
    Publication date: March 3, 2016
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC
    Inventors: Nirupama KENKARE, Kermit S. KWAN, Mohammad Jamal EL-HIBRI
  • Patent number: 9261626
    Abstract: The invention is related to a disposable contact lens comprising a top coating which is made of a hydrophilic polymeric material including dangling hydrophilic polymer chains covalently linked to the hydrophilic polymeric material through oligo-caprolactone linkages susceptible to enzymatic degradation in the eyes. The top coating is stable to lens processing/storage and confers lubricity to the lens. However, it slowly is degraded during the lens wear due to the action of enzymes (e.g., Lipase) in tear film. The loss in lubricity will be experienced as a drop in comfort for the lens wearer and thereby serves as the built-in compliance features of the disposable contact lens.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: February 16, 2016
    Assignee: Novartis AG
    Inventors: Newton T. Samuel, Nirupama Kenkare
  • Publication number: 20150267023
    Abstract: A foam material made from a composition [composition (C)] comprising at least one high temperature poly(aryl ether sulfone) (PAESHT) polymer characterized in that the PAES polymer comprises from 1 to 99% by weight amount of at least one recurring unit (RPAES) [(RPAES?1)]) based on the total amount of recurring units, and from 1 to 99% by weight amount of at least one recurring unit (RPAES) [(RPAES?2)], based on the total amount of recurring units, and wherein said (RPAES?2) recurring unit is different from the (RPAES?1) recurring unit.
    Type: Application
    Filed: October 10, 2013
    Publication date: September 24, 2015
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC.
    Inventors: Mohammad Jamal El-Hibri, Nirupama Kenkare, Kermit S. Kwan, William Walter Looney
  • Publication number: 20140343184
    Abstract: A method for manufacturing a thermo formed poly(biphenyl ether sulfone) foam article which comprises following three steps: Step 1. preparing a poly(biphenyl ether sulfone) foamable composition [composition (FP)], foaming the composition (FP) to yield a foamed poly(biphenyl ether sulfone) material [foam (P) material], and Step 2. molding said foam (P) material under the effect of heat and pressure to provide a thermoformed foamed article. Step 3. molding said foam (P) material under the effect of heat and pressure to provide a thermoformed foamed article.
    Type: Application
    Filed: December 19, 2012
    Publication date: November 20, 2014
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC.
    Inventors: Shari W. Axelrad, Keshav Gautam, Armin Klesing, Mohammad Jamal El-Hibri, Marc Schelles, Nirupama Kenkare
  • Publication number: 20140256835
    Abstract: A foam material made from a composition (C) comprising a polyetherimide (PEI) and a poly(biphenyl ether sulfone) (P2).
    Type: Application
    Filed: October 11, 2012
    Publication date: September 11, 2014
    Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC.
    Inventors: Armin Klesing, Shari W. Axelrad, Mohammad Jamal El-Hibri, Marc Schelles, Nirupama Kenkare
  • Patent number: 8784867
    Abstract: The instant invention pertains to a method for producing contact lenses with improved oxidative stability of Carotenoids in the contact lens. The method of the invention involves adding a vitamin E material into a contact lens in an amount sufficient to reduce oxidative degradation of Carotenoids in the lens by at least about 30% in comparison with an identical contact lens without the vitamin E material.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: July 22, 2014
    Assignee: Novartis AG
    Inventors: Newton T. Samuel, Nirupama Kenkare, Peter D. Lackey, Jessie Chen
  • Patent number: 6991679
    Abstract: An apparatus for applying a primary coating and a secondary coating to an optical fiber is disclosed. The apparatus includes at least one pressurized source of primary coating, a first primary reservoir for applying a first layer of the primary coating to the optical fiber, a first primary die including a first primary land configured to size the first layer of the primary coating, a second primary reservoir for applying a second layer of the primary coating to the optical fiber, a second primary die including a second primary land, a pressurized source of the secondary coating, a secondary reservoir for applying a layer of the secondary coating to the optical fiber, and a secondary die including a secondary land configured to size the layer of the secondary coating.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: January 31, 2006
    Assignee: Fitel USA Corporation
    Inventors: Nirupama Kenkare, Robert C. Moore, Mahmood Tabaddor, Jason W. Shiroishi
  • Patent number: 6923023
    Abstract: Methods and apparatuses estimate and control optical fiber primary coating diameter for wet-on-wet optical fiber manufacturing. The primary coating diameter for a particular length of optical fiber is calculated based upon a measurement of the weight of primary and/or secondary coating material consumed during optical fiber manufacturing. Control of the primary coating diameter is effected by a coating controller which can increase or decrease the primary coating diameter through control of glass temperature, coating viscosity and/or other parameters during wet-on-wet fiber manufacture.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: August 2, 2005
    Assignee: Fitel U.S.A. Corporation
    Inventors: Siu-Ping Hong, Jason W. Shiroishi, Nirupama Kenkare
  • Publication number: 20040170758
    Abstract: An apparatus for applying a primary coating and a secondary coating to an optical fiber is disclosed. The apparatus includes at least one pressurized source of primary coating, a first primary reservoir for applying a first layer of the primary coating to the optical fiber, a first primary die including a first primary land configured to size the first layer of the primary coating, a second primary reservoir for applying a second layer of the primary coating to the optical fiber, a second primary die including a second primary land, a pressurized source of the secondary coating, a secondary reservoir for applying a layer of the secondary coating to the optical fiber, and a secondary die including a secondary land configured to size the layer of the secondary coating.
    Type: Application
    Filed: February 28, 2003
    Publication date: September 2, 2004
    Inventors: Nirupama Kenkare, Robert C. Moore, Mahmood Tabaddor, Jason W. Shiroishi
  • Publication number: 20040170367
    Abstract: An optical fiber including a layer of primary coating material having a first modulus, a layer of color coating material having a second modulus, a layer of secondary coating having a third modulus, and wherein the first modulus, the second modulus, and the third modulus are different values.
    Type: Application
    Filed: October 15, 2003
    Publication date: September 2, 2004
    Inventors: Nirupama Kenkare, Robert C. Moore, John M. Turnipseed, Shunhe Xiong
  • Publication number: 20040060323
    Abstract: Methods and apparatuses estimate and control optical fiber primary coating diameter for wet-on-wet optical fiber manufacturing. The primary coating diameter for a particular length of optical fiber is calculated based upon a measurement of the weight of primary and/or secondary coating material consumed during optical fiber manufacturing. Control of the primary coating diameter is effected by a coating controller which can increase or decrease the primary coating diameter through control of glass temperature, coating viscosity and/or other parameters during wet-on-wet fiber manufacture.
    Type: Application
    Filed: October 1, 2002
    Publication date: April 1, 2004
    Applicant: Fitel U.S.A. Corp.
    Inventors: Siu-Ping Hong, Jason W. Shiroishi, Nirupama Kenkare