Patents by Inventor Viswanathan Kalyanaraman

Viswanathan Kalyanaraman 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: 11613610
    Abstract: A process for the manufacture of thermoplastic polymer particles include combining a first solution having a polyetherimide, a polycarbonate, or a combination thereof and an organic solvent with an aqueous solution including a surfactant, and agitating the resulting mixture using a shear force generating device operating at a preselected peripheral rotational speed to provide an emulsion. The emulsion is heated to remove the organic solvent and provide an aqueous polymer dispersion including the thermoplastic polymer particles.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: March 28, 2023
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Rahul Patil, Zeljko Kuzeljevic, William E. Hollar, Jr., Viswanathan Kalyanaraman, Mitchell Reynolds, Zachary Anderson
  • Publication number: 20220411602
    Abstract: The present disclosure includes thin, high-stiffness laminates, portable electronic device housings including the same, and methods for making such laminates and portable electronic device housings. Some laminates include an inner section having one or more first laminae and one or more second laminae, and first and second outer sections disposed on opposing sides of the inner section, each having one or more third laminae The laminate has a width and a length that is perpendicular to the width. Each of the first lamina(e) can have fibers aligned in a direction parallel to the length, each of the second lamina(e) can have fibers aligned in a direction parallel to the width, and each of the third lamina(e) can have fibers aligned in a direction angnlarly disposed at an angle of at least 10 degrees to each of the length and the width.
    Type: Application
    Filed: October 9, 2020
    Publication date: December 29, 2022
    Applicant: SHPP Global Technologies B.V.
    Inventors: Devendra Narayandas BAJAJ, Chiel Albertus LEENDERS, Gabriel Julianus Maria HOOGLAND, Viswanathan KALYANARAMAN, Cameron YOUNGSTROM
  • Publication number: 20220389216
    Abstract: A polycarbonate composition includes particular amounts of a virgin polycarbonate and a purified recycled polycarbonate. The polycarbonate composition can exhibit improved color. The polycarbonate composition can be useful for forming molded articles. A method of purifying a post-consumer or post-industrial recycle polycarbonate composition is also disclosed.
    Type: Application
    Filed: December 15, 2020
    Publication date: December 8, 2022
    Inventors: Viswanathan KALYANARAMAN, Kaushal GANDHI, Philip Wesley BELL, Gregory SHANKWITZ
  • Publication number: 20220289982
    Abstract: Ceramic-polymer composites and methods. The ceramic-polymer composites, in powder and/or pellet forms, comprise a plurality of core-shell particles, where: each of the core-shell particles comprises a core and a shell around the core; the core comprises a ceramic selected from the group of ceramics consisting of: Al2O3, Fe2O3, ZnO, ZrO2, and SiO2; and the shell comprises a polymer selected from the group of polymers consisting of: PC copolymers, polyetherimide (PEI), polyetherimide (PEI) copolymers, polyphenyl sulfone (PPSU), polyarylethersulfone (PAES), and poly ether sulfones (PES). In powder form, the core-shell particles are in a substantially dry powder form having a moisture content of less than 2% by weight. In pellet form, shells of adjacent core-shell particles are joined to resist separation of the adjacent core-shell particles and deformation of a respective pellet.
    Type: Application
    Filed: September 25, 2020
    Publication date: September 15, 2022
    Applicant: SHPP Global Technologies B.V.
    Inventors: Viswanathan KALYANARAMAN, Devendra Narayandas BAJAJ, Thomas Lane EVANS
  • Publication number: 20220289638
    Abstract: Semi-crystalline polymer-ceramic composites and methods. The ceramic-polymer composites, in powder and/or pellet forms, comprise a plurality of core-shell particles, where: each of the core-shell particles comprises a core and a shell around the core; the core comprises a ceramic that is selected from the group of ceramics consisting of: Al2O3, ZrO2, and combinations of Al2O3 and ZrO2; and the shell comprises a semi-crystalline polymer selected from the group of semi-crystalline polymers consisting of: polyphenylene sulfide (PPS), polyaryl ether ketone (PAEK), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), semi-crystalline polyimide (SC PI), and semi-crystalline polyamide (SC Polyamide). The core-shell particles can be in a powder form (e.g., a dry powder). In pellet form, shells of adjacent core-shell particles are joined to resist separation of the adjacent core-shell particles and deformation of a respective pellet.
    Type: Application
    Filed: September 25, 2020
    Publication date: September 15, 2022
    Applicant: SHPP Global Technologies B.V.
    Inventors: Viswanathan KALYANARAMAN, Devendra Narayandas BAJAJ, Thomas Lane EVANS
  • Publication number: 20220251309
    Abstract: Fine polymer particles are prepared by dissolving a polycarbonate, a poly(arylene ether), or a poly(arylene ether sulfone), each in a specific solvent, to form a slurry, heating the slurry to a temperature greater than the solvent boiling point to form a homogeneous solution, cooling the solution to form a dispersion of fine particles, and isolating the fine particles. A volume-based distribution of the isolated fine particles has a median equivalent spherical diameter less than or equal to 125 micrometers.
    Type: Application
    Filed: September 14, 2020
    Publication date: August 11, 2022
    Inventor: Viswanathan KALYANARAMAN
  • Patent number: 11359059
    Abstract: A method of preparing polymer particles includes combining a polyetherimide and a solvent at a first temperature to provide a slurry, wherein the polyetherimide is not soluble in the solvent at the first temperature; heating the slurry to a second temperature and at a pressure effective to dissolve the polyetherimide in the solvent to provide a homogenous solution; cooling the homogenous solution to a third temperature to provide a dispersion including a plurality of polymer particles; and isolating the polymer particles. The polymer particles have a Dv90 particle size of less than or equal to 250 micrometers. Polymers powders prepared according to the method are also described herein, wherein the powder includes a plurality of semi-crystalline polymer particles having a Dv90 of less than or equal to 250 micrometers.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: June 14, 2022
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Viswanathan Kalyanaraman, Thomas Link Guggenheim
  • Patent number: 11352498
    Abstract: Provided are amorphous and at least partially crystalline polyetherimide compositions having a comparatively narrow particle size distribution and are particularly suited for additive manufacturing processes. The compositions comprise a population of polyetherimide particulates are characterized as having a zero-shear viscosity sufficiently low so as to achieve a coalescence of at least 0.5, and preferably of about 1.0, as characterized by the Frenkel model at a temperature less than 450° C.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: June 7, 2022
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Brian Gray Price, Elena Miloskovska, Bruke Jofore, Raul Fernandez Cabello, Hao Gu, Vandita Pai-Paranjape, Viswanathan Kalyanaraman
  • Publication number: 20210388206
    Abstract: Polymer-ceramic composite articles with relatively low dissipation factor (Df) and relatively high dielectric constant (Dk), as well as polymer-ceramic core-shell powders and pellets adapted for making such composite articles.
    Type: Application
    Filed: June 15, 2021
    Publication date: December 16, 2021
    Inventors: Devendra Narayandas BAJAJ, Christopher Anthony GRABOWSKI, Viswanathan KALYANARAMAN, Johannes DE BROUWER
  • Patent number: 11053358
    Abstract: A method for making spherical polymer particles, the method including: providing a polymer solution including a polymer in an amount of less than 10% by weight, based on the total weight of the polymer solution, and an organic solvent; combining the polymer solution, deionized water, and a first surfactant to provide an emulsification composition having an organic solvent fraction of 0.60 or higher by volume; forming an emulsion from the emulsification composition; and adding the emulsion into receiving water maintained at a temperature above the boiling point of the organic solvent for a period sufficient to evaporate the organic solvent, wherein the adding and the evaporating are at a rate effective to form an aqueous slurry comprising spherical polymer particles having a Dv100 (volume-based diameter) of 10 micrometers or less, as measured by laser diffraction.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: July 6, 2021
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventor: Viswanathan Kalyanaraman
  • Patent number: 11021573
    Abstract: A polyimide-forming composition includes a particulate polyimide precursor composition having an average particle size of 0.1 to 100 micrometers wherein the polyimide precursor composition comprises a substituted or unsubstituted C4-40 bisanhydride, and a substituted or unsubstituted divalent C1-20 diamine; an aqueous carrier; and a surfactant. A method of manufacturing an article including a polyimide includes the steps of forming a preform comprising the polyimide-forming composition; and heating the preform at a temperature and for a period of time effective to imidize the polyimide precursor composition and form the polyimide. An article prepared by the method, and a layer or coating including a polyimide and a surfactant are also described.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: June 1, 2021
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventor: Viswanathan Kalyanaraman
  • Publication number: 20210104343
    Abstract: Various aspects disclosed relate to hybrid nanoparticles embedded in non-magnetic microparticles. These materials can be used to directionally orient and impart an ordered structure to a variety of materials.
    Type: Application
    Filed: April 17, 2019
    Publication date: April 8, 2021
    Inventors: Devendra BAJAJ, Viswanathan KALYANARAMAN
  • Publication number: 20210070940
    Abstract: A method for manufacturing a poly(imide) prepolymer varnish includes combining a bisanhydride powder or organic diamine and a solvent to form a mixture, and adding an organic diamine or bisanhydride powder to the mixture to form a poly(imide) prepolymer. The method of manufacturing the varnish further includes at least one of adding an effective amount of a secondary or tertiary amine to solubilize the poly(imide) prepolymer powder, heating the mixture to a temperature effective to provide the varnish, or agitating the mixture to provide the varnish. The poly(imide) prepolymer varnish can have a residual organic diamine content of less than or equal to 1000 ppm. A poly(imide) polymer prepared from the prepolymer varnish is also disclosed.
    Type: Application
    Filed: November 20, 2020
    Publication date: March 11, 2021
    Inventors: Viswanathan Kalyanaraman, Norimitsu Yamaguchi
  • Patent number: 10913827
    Abstract: A process for the manufacture of polycarbonate particles is disclosed herein. The process includes combining a first solution including a polycarbonate and a phosphorus-containing flame retardant or a flame retardant polycarbonate, and an organic solvent with a second solution including a surfactant and an aqueous solvent substantially immiscible with the organic solvent, under conditions of shear and temperature effective to provide an emulsion. At least a portion of the organic solvent is removed from the emulsion to provide an aqueous slurry having a plurality of particles, wherein the particles include the polycarbonate and the phosphorus-containing flame retardant or the flame retardant polycarbonate.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: February 9, 2021
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Zeljko Kuzeljevic, Viswanathan Kalyanaraman, Rahul Patil, Kapil Inamdar, Zachary Anderson, William E. Hollar, Sasi Sethumadhavan Kannamkumarath
  • Patent number: 10899887
    Abstract: A copolyimide includes the reaction product of an aromatic dianhydride component including a substituted or unsubstituted pyromellitic dianhydride or a functional derivative thereof and an aromatic bis(ether phthalic anhydride) or a functional derivative thereof, and an organic diamine component comprising a substituted or unsubstituted phenylene diamine and a diaminodiphenyl sulfone. Articles and compositions including the copolyimides and methods of manufacturing a polyimide film are also described.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: January 26, 2021
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Dadasaheb V. Patil, Viswanathan Kalyanaraman
  • Patent number: 10844173
    Abstract: A method for manufacturing a poly(imide) prepolymer powder includes combining a bisanhydride powder or organic diamine and a solvent comprising an alcohol, a water-soluble ketone or water to form a mixture, adding an organic diamine or bisanhydride powder to the mixture to form a poly(imide) prepolymer, and removing the solvent to provide the poly(imide) prepolymer powder. A method for manufacturing a poly(imide) prepolymer varnish includes combining a bisanhydride powder or organic diamine and a solvent comprising an alcohol, a water-soluble ketone or water to form a mixture, and adding an organic diamine or bisanhydride powder to the mixture to form a poly(imide) prepolymer. The method of manufacturing the varnish further includes at least one of adding an effective amount of a secondary or tertiary amine to solubilize the poly(imide) prepolymer powder, heating the mixture to a temperature effective to provide the varnish, or agitating the mixture to provide the varnish.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: November 24, 2020
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Viswanathan Kalyanaraman, Norimitsu Yamaguchi
  • Publication number: 20200231753
    Abstract: A method for modifying a polyimide includes reacting a first polyimide with an amine to produce a second polyimide having an anhydride-amine stoichiometry of ?2 to ?40 mol % and reacting the second polyimide with a monoanhydride, a bis(anhydride), a bis(ether anhydride) or a tetracarboxylic acid to produce a final polyimide having an anhydride-amine stoichiometry of ?1 to 2 mol %.
    Type: Application
    Filed: September 19, 2018
    Publication date: July 23, 2020
    Inventors: Nitin Vilas Tople, Viswanathan Kalyanaraman, Kelly Leung, Thomas Link Guggenheim
  • Publication number: 20200223989
    Abstract: A process for the manufacture of polycarbonate particles is disclosed herein. The process includes combining a first solution including a polycarbonate and a phosphorus-containing flame retardant or a flame retardant polycarbonate, and an organic solvent with a second solution including a surfactant and an aqueous solvent substantially immiscible with the organic solvent, under conditions of shear and temperature effective to provide an emulsion. At least a portion of the organic solvent is removed from the emulsion to provide an aqueous slurry having a plurality of particles, wherein the particles include the polycarbonate and the phosphorus-containing flame retardant or the flame retardant polycarbonate.
    Type: Application
    Filed: September 7, 2018
    Publication date: July 16, 2020
    Inventors: Zeljko Kuzeljevic, Viswanathan Kalyanaraman, Rahul Patil, Kapil Inamdar, Zachary Anderson, William E. Hollar, Sasi Sethumadhavan Kannamkumarath
  • Publication number: 20200199304
    Abstract: A process for the manufacture of thermoplastic polymer particles include combining a first solution having a polyetherimide, a polycarbonate, or a combination thereof and an organic solvent with an aqueous solution including a surfactant, and agitating the resulting mixture using a shear force generating device operating at a preselected peripheral rotational speed to provide an emulsion. The emulsion is heated to remove the organic solvent and provide an aqueous polymer dispersion including the thermoplastic polymer particles.
    Type: Application
    Filed: August 14, 2018
    Publication date: June 25, 2020
    Inventors: Rahul Patil, Zeljko Kuzeljevic, William Hollar, Jr., Viswanathan Kalyanaraman, Mitchell Reynolds, Zachary Anderson
  • Patent number: 10669437
    Abstract: A method comprising: providing a powder composition including at least one ultrafine, spherical thermoplastic polymer powder having a glass transition temperature (Tg) of at least 150 degrees C.; and powder bed fusing the powder composition to form a three-dimensional article.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: June 2, 2020
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Keith E. Cox, Franciscus Maria Huijs, Viswanathan Kalyanaraman