Patents by Inventor Sriram Rangarajan Iyer

Sriram Rangarajan Iyer 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: 10000424
    Abstract: A method for firing a green honeycomb ceramic body in a kiln may include heating the green honeycomb ceramic body in four stages. The first stage may include heating the green honeycomb ceramic body from room temperature to a first temperature that at a first heating rate that is greater than or equal to about 75° C./hr. The second stage may include heating the green honeycomb ceramic body from the first temperature to a second temperature at a second heating rate that is less than or equal to the first heating rate. The third stage may include heating the green honeycomb ceramic body from the second temperature to a hold temperature at a third heating rate that is less than or equal to the first heating rate. The fourth stage may include holding the green honeycomb ceramic body at the hold temperature to remove residual carbon.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: June 19, 2018
    Assignee: Corning Incorporated
    Inventors: Douglas Munroe Beall, David Jack Bronfenbrenner, Margaret Kathleen Faber, Sriram Rangarajan Iyer, Patrick David Tepesch, Douglas Richard Wing
  • Patent number: 9673483
    Abstract: Disclosed herein are methods for making a solid lithium ion electrolyte membrane, the methods comprising combining a first reactant chosen from amorphous, glassy, or low melting temperature solid reactants with a second reactant chosen from refractory oxides to form a mixture; heating the mixture to a first temperature to form a homogenized composite, wherein the first temperature is between a glass transition temperature of the first reactant and a crystallization onset temperature of the mixture; milling the homogenized composite to form homogenized particles; casting the homogenized particles to form a green body; and sintering the green body at a second temperature to form a solid membrane. Solid lithium ion electrolyte membranes manufactured according to these methods are also disclosed herein.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: June 6, 2017
    Assignee: Corning Incorporated
    Inventors: Michael Edward Badding, Indrajit Dutta, Sriram Rangarajan Iyer, Brian Alan Kent, Nadja Teresia Lonnroth
  • Patent number: 9446560
    Abstract: A method for firing a green honeycomb ceramic body including heating the green honeycomb ceramic body from room temperature to a first temperature of about 300° C. The green honeycomb ceramic body is then heated from the first temperature to a second temperature of greater than or equal to about 800° C. at a heating rate of greater than or equal to about 90° C./hr. The green honeycomb ceramic body may have a diameter of from greater than or equal to about 4.0 inches to less than or equal to about 9.0 inches, and it may include a carbon-based pore former in a concentration of from greater than or equal to about 10% to less than or equal to about 45% by weight.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: September 20, 2016
    Assignee: Corning Incorporated
    Inventors: David Jack Bronfenbrenner, Sriram Rangarajan Iyer
  • Publication number: 20160211546
    Abstract: Disclosed herein are methods for making a solid lithium ion electrolyte membrane, the methods comprising combining a first reactant chosen from amorphous, glassy, or low melting temperature solid reactants with a second reactant chosen from refractory oxides to form a mixture; heating the mixture to a first temperature to form a homogenized composite, wherein the first temperature is between a glass transition temperature of the first reactant and a crystallization onset temperature of the mixture; milling the homogenized composite to form homogenized particles; casting the homogenized particles to form a green body; and sintering the green body at a second temperature to form a solid membrane. Solid lithium ion electrolyte membranes manufactured according to these methods are also disclosed herein.
    Type: Application
    Filed: January 19, 2015
    Publication date: July 21, 2016
    Inventors: MICHAEL EDWARD BADDING, Indrajit Dutta, Sriram Rangarajan Iyer, Brian Alan Kent, Nadja Teresia Lonnroth
  • Patent number: 9133062
    Abstract: Methods of firing a cordierite green body to form a fired cordierite body. The green body comprises cordierite-forming raw materials and organic material, the body having a core portion and a skin portion. The green body is pre-heated to a pre-heat temperature that is less than a thermal decomposition temperature of the organic material. The green body is maintained at the pre-heat temperature for a period of time sufficient to minimize a temperature differential between the core portion and the skin portion. The green body is heated to a low firing temperature in a firing atmosphere sufficient to reduce a content of the organic material and to substantially remove chemically bound water from hydrous alumina. The green body is heated to a high firing temperature in a firing atmosphere sufficient to reduce the content of the organic material prior to a substantial removal of chemically bound water from clay.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: September 15, 2015
    Assignee: Corning Incorporated
    Inventors: Robert Joseph Castilone, Sriram Rangarajan Iyer, Mark Allen Spetseris, Jonathan Mark Stalker
  • Patent number: 9005517
    Abstract: A method for making a cordierite filter article, including: firing an extruded green body batch composition according to: a first temperature ramping from ambient temperature up to a first soaking temperature; a first soaking at a temperature of at least 1255° C. for at least 2 hours; a second temperature ramping from the first soak temperature down to a second soak temperature; and a second soaking at a temperature of at least 1250° C. and at least 5° C. below the first soaking temperature, as defined herein.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: April 14, 2015
    Assignee: Corning Incorporated
    Inventors: David J Bronfenbrenner, Lisa Larae Hepburn, Sriram Rangarajan Iyer, Lev Lvovitch Kuandykov, Dell Joseph St Julien, Elizabeth Ann White
  • Publication number: 20150028527
    Abstract: A method for firing a green honeycomb ceramic body including heating the green honeycomb ceramic body from room temperature to a first temperature of about 300° C. The green honeycomb ceramic body is then heated from the first temperature to a second temperature of greater than or equal to about 800° C. at a heating rate of greater than or equal to about 90° C./hr. The green honeycomb ceramic body may have a diameter of from greater than or equal to about 4.0 inches to less than or equal to about 9.0 inches, and it may include a carbon-based pore former in a concentration of from greater than or equal to about 10% to less than or equal to about 45% by weight.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 29, 2015
    Applicant: CORNING INCORPORATED
    Inventors: David Jack Bronfenbrenner, Sriram Rangarajan Iyer
  • Publication number: 20140252695
    Abstract: A method for firing a green honeycomb ceramic body in a kiln may include heating the green honeycomb ceramic body in four stages. The first stage may include heating the green honeycomb ceramic body from room temperature to a first temperature that at a first heating rate that is greater than or equal to about 75° C./hr. The second stage may include heating the green honeycomb ceramic body from the first temperature to a second temperature at a second heating rate that is less than or equal to the first heating rate. The third stage may include heating the green honeycomb ceramic body from the second temperature to a hold temperature at a third heating rate that is less than or equal to the first heating rate. The fourth stage may include holding the green honeycomb ceramic body at the hold temperature to remove residual carbon.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 11, 2014
    Applicant: CORNING INCORPORATED
    Inventors: Douglas Munroe Beall, David Jack Bronfenbrenner, Margaret Kathleen Faber, Sriram Rangarajan Iyer, Patrick David Tepesch, Douglas Richard Wing
  • Publication number: 20140138882
    Abstract: Methods of firing a cordierite green body to form a fired cordierite body. The green body comprises cordierite-forming raw materials and organic material, the body having a core portion and a skin portion. The green body is pre-heated to a pre-heat temperature that is less than a thermal decomposition temperature of the organic material. The green body is maintained at the pre-heat temperature for a period of time sufficient to minimize a temperature differential between the core portion and the skin portion. The green body is heated to a low firing temperature in a firing atmosphere sufficient to reduce a content of the organic material and to substantially remove chemically bound water from hydrous alumina. The green body is heated to a high firing temperature in a firing atmosphere sufficient to reduce the content of the organic material prior to a substantial removal of chemically bound water from clay.
    Type: Application
    Filed: November 21, 2012
    Publication date: May 22, 2014
    Applicant: CORNING INCORPORATED
    Inventors: Robert Joseph Castilone, Sriram Rangarajan Iyer, Mark Allen Spetseris, Jonathan Mark Stalker
  • Publication number: 20130307176
    Abstract: A method for making a cordierite filter article, including: firing an extruded green body batch composition according to: a first temperature ramping from ambient temperature up to a first soaking temperature; a first soaking at a temperature of at least 1255° C. for at least 2 hours; a second temperature ramping from the first soak temperature down to a second soak temperature; and a second soaking at a temperature of at least 1250° C. and at least 5° C. below the first soaking temperature, as defined herein.
    Type: Application
    Filed: May 16, 2012
    Publication date: November 21, 2013
    Inventors: David J. Bronfenbrenner, Lisa Larae Hepburn, Sriram Rangarajan Iyer, Lev Lvovitch Kuandykov, Dell Joseph St Julien, Elizabeth Ann White
  • Patent number: 8444737
    Abstract: A method of firing a green structure to produce a ceramic structure may comprise heating a firing environment during a first stage of firing of a green structure over a first timed temperature cycle having an average ramp rate sufficient to substantially complete burnout of organic material prior to initiation of clay dehydration proximate a core of the ceramic structure. The method may further comprise heating the firing environment during a second stage of the firing over a second timed temperature cycle having an average ramp rate that is faster than the average ramp rate of the first timed temperature cycle.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: May 21, 2013
    Assignee: Corning Incorporated
    Inventor: Sriram Rangarajan Iyer
  • Publication number: 20110129640
    Abstract: A method for making porous articles, including: depositing a powder mixture layer comprising a binder powder, and at least one structural powder; contacting the powder mixture layer and an aqueous liquid to selectively activate the binder powder and form a green layer; repeating the depositing and the contacting sequence at least one time; and de-powdering and drying of the resulting green body. The binder powder can include, for example, a protein that is soluble in water at or below about 25° C. The disclosure also provides articles, having high porosity and optionally intricate 3D structures, as defined herein.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 2, 2011
    Inventors: George Halsey Beall, Michael Thomas Gallagher, Keith Leonard House, Sriram Rangarajan Iyer, Paul John Shustack
  • Publication number: 20100218472
    Abstract: A method of firing a green structure to produce a ceramic structure may comprise heating a firing environment during a first stage of firing of a green structure over a first timed temperature cycle having an average ramp rate sufficient to substantially complete burnout of organic material prior to initiation of clay dehydration proximate a core of the ceramic structure. The method may further comprise heating the firing environment during a second stage of the firing over a second timed temperature cycle having an average ramp rate that is faster than the average ramp rate of the first timed temperature cycle.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Inventor: Sriram Rangarajan Iyer