Patents by Inventor Nandakumar Nagarajan

Nandakumar Nagarajan 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: 10060016
    Abstract: Polycrystalline materials are prepared by electrodeposition of a precursor material that is subsequently heat-treated to induce at least a threefold increase in the grain size of the material to yield a relatively high fraction of ‘special’ low ? grain boundaries and a randomized crystallographic texture. The precursor metallic material has sufficient purity and a fine-grained microstructure (e.g., an average grain size of 4 nm to 5 ?m). The resulting metallic material is suited to the fabrication of articles requiring high mechanical or physical isotropy and/or resistance to grain boundary-mediated deformation or degradation mechanisms.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 28, 2018
    Assignee: INTEGRAN TECHNOLOGIES INC.
    Inventors: Gino Palumbo, Iain Brooks, Klaus Tomantschger, Peter Lin, Karl Aust, Nandakumar Nagarajan, Francisco Gonzalez
  • Patent number: 9970120
    Abstract: A method for electrodepositing a coating/free-standing layer on a workpiece in an electrolytic cell includes moving the workpiece and an anode applicator tool having a consumable anode insert relative to each other; anodically dissolving a metal from the insert and cathodically depositing the metal on the workpiece; providing flow of electrolyte solution through the insert to ensure that greater than 90% of the anodic reaction is represented by dissolution of the metal; recirculating collected electrolyte solution exiting the electrolytic cell through the insert; applying an electric current to the electrolytic cell; maintaining a concentration of the anodically dissolved metal within ±25% of each Ampere-hour per liter of electroplating solution; and creating a cathodic electrodeposit on the workpiece which includes the anodically dissolved metal, the chemical composition of the deposit varying by less than 25% in the deposition direction over a selected thickness of up to 25 microns of the deposit.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: May 15, 2018
    Assignee: Integran Technologies Inc.
    Inventors: Klaus Tomantschger, Diana Facchini, Francisco Gonzalez, Jonathan McCrea, John Kratochwil, Dan Woloshyn, Yusuf Bismilla, Nandakumar Nagarajan, Mioara Neacsu
  • Publication number: 20160208369
    Abstract: Polycrystalline materials are prepared by electrodeposition of a precursor material that is subsequently heat-treated to induce at least a threefold increase in the grain size of the material to yield a relatively high fraction of ‘special’ low ? grain boundaries and a randomized crystallographic texture. The precursor metallic material has sufficient purity and a fine-grained microstructure (e.g., an average grain size of 4 nm to 5 pm). The resulting metallic material is suited to the fabrication of articles requiring high mechanical or physical isotropy and/or resistance to grain boundary-mediated deformation or degradation mechanisms.
    Type: Application
    Filed: January 21, 2016
    Publication date: July 21, 2016
    Applicant: INTEGRAN TECHNOLOGIES INC.
    Inventors: Gino PALUMBO, Iain BROOKS, Klaus TOMANTSCHGER, Peter LIN, Karl AUST, Nandakumar NAGARAJAN, Francisco GONZALEZ
  • Publication number: 20160130713
    Abstract: A method for electrodepositing a coating/free-standing layer on a workpiece in an electrolytic cell includes moving the workpiece and an anode applicator tool having a consumable anode insert relative to each other; anodically dissolving a metal from the insert and cathodically depositing the metal on the workpiece; providing flow of electrolyte solution through the insert to ensure that greater than 90% of the anodic reaction is represented by dissolution of the metal; recirculating collected electrolyte solution exiting the electrolytic cell through the insert; applying an electric current to the electrolytic cell; maintaining a concentration of the anodically dissolved metal within ±25% of each Ampere-hour per liter of electroplating solution; and creating a cathodic electrodeposit on the workpiece which includes the anodically dissolved metal, the chemical composition of the deposit varying by less than 25% in the deposition direction over a selected thickness of up to 25 microns of the deposit.
    Type: Application
    Filed: January 18, 2016
    Publication date: May 12, 2016
    Inventors: Klaus Tomantschger, Diana Facchini, Francisco Gonzalez, Jonathan McCrea, John Kratochwil, Dan Woloshyn, Yusuf Bismilla, Nandakumar Nagarajan, Mioara Neacsu
  • Patent number: 9303322
    Abstract: Articles containing fine-grained and/or amorphous metallic coatings/layers on at least part of their exposed surfaces are imprinted with surface structures to raise the contact angle for water in the imprinted areas at room temperature by equal to or greater than 10°, when compared to the flat and smooth metallic material surface of the same composition.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: April 5, 2016
    Assignee: Integran Technologies Inc.
    Inventors: Jared J. Victor, Uwe Erb, Klaus Tomantschger, Nandakumar Nagarajan, Diana Facchini
  • Patent number: 9260790
    Abstract: Polycrystalline materials are prepared by electrodeposition of a precursor material that is subsequently heat-treated to induce at least a threefold increase in the grain size of the material to yield a relatively high fraction of ‘special’ low ? grain boundaries and a randomized crystallographic texture. The precursor metallic material has sufficient purity and a fine-grained microstructure (e.g., an average grain size of 4 nm to 5 ?m). The resulting metallic material is suited to the fabrication of articles requiring high mechanical or physical isotropy and/or resistance to grain boundary-mediated deformation or degradation mechanisms.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: February 16, 2016
    Assignee: INTEGRAN TECHNOLOGIES INC.
    Inventors: Gino Palumbo, Iain Brooks, Klaus Tomantschger, Peter Lin, Karl Aust, Nandakumar Nagarajan, Francisco Gonzalez
  • Patent number: 9249521
    Abstract: Anode applicators include consumable anodes, that can be operated in a non-stationary mode and are insensitive to orientation, are used in selective plating/brush electrodeposition of coatings or free-standing components. The flow-through dimensionally-stable, consumable anodes employed are perforated/porous to provide relatively unimpeded electrolyte flow and operate at low enough electrochemical potentials to provide for anodic metal/alloy dissolution avoiding undesired anodic reactions. The consumable anodes include consumable anode material(s) in high surface area to reduce the local anodic current density. During electroplating, sufficient electrolyte is pumped through the consumable anodes at sufficient flow rates to minimize concentration gradient and/or avoid the generation of chlorine and/or oxygen gas and/or undesired reaction such as the anodic oxidation of P-bearing ions in the electrolyte.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 2, 2016
    Assignee: Integran Technologies Inc.
    Inventors: Klaus Tomantschger, Diana Facchini, Francisco Gonzalez, Jonathan McCrea, John Kratochwil, Dan Woloshyn, Yusuf Bismilla, Nandakumar Nagarajan, Mioara Neacsu
  • Patent number: 8911878
    Abstract: Metal-clad polymer articles containing structural fine-grained and/or amorphous metallic coatings/layers optionally containing solid particulates dispersed therein. The fine-grained and/or amorphous metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling although the CLTE of the metallic layer and the one of the substrate is mismatched. The interface between the metallic layer and the polymer is suitably pretreated to withstand thermal cycling without failure.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: December 16, 2014
    Assignee: Integran Technologies Inc.
    Inventors: Klaus Tomantschger, Jonathan McCrea, Nandakumar Nagarajan, Francisco Gonzalez, Gino Palumbo, Konstantinos Panagiotopoulos, Herath Katugaha
  • Patent number: 8906515
    Abstract: Metal-clad polymer articles containing structural fine-grained and/or amorphous metallic coatings/layers optionally containing solid particulates dispersed therein, are disclosed. The fine-grained and/or amorphous metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling although the coefficient of linear thermal expansion (CLTE) of the metallic layer and the substrate are mismatched. The interface between the metallic layer and the polymer is suitably pretreated to withstand thermal cycling without failure.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: December 9, 2014
    Assignee: Integran Technologies, Inc.
    Inventors: Klaus Tomantschger, Jonathan McCrea, Nandakumar Nagarajan, Francisco Gonzalez, Gino Palumbo, Konstantinos Panagiotopoulos, Herath Katugaha, Diana Facchini, Jared J. Victor, Uwe Erb
  • Publication number: 20140255722
    Abstract: Corrosion resistant, grain-refined and/or amorphous Ni- and Cu-free Co-bearing coatings on polymer substrates for use in human contact applications, including industrial products, automotive products, medical surgical devices, and medical products, are disclosed.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 11, 2014
    Applicant: Integran Technologies Inc.
    Inventors: Nandakumar Nagarajan, Mioara Neacsu, Gino Palumbo, Klaus Tomantschger
  • Patent number: 8784713
    Abstract: Super-hydrophobic and self-cleaning articles produced by imprinting exposed surfaces with suitable fine-grained and/or amorphous metallic embossing dies to transfer a dual surface structure, including ultra-fine features less than or equal to 100 nm embedded in and overlaying a surface topography with macro-surface structures greater than or equal to 1 micron are disclosed.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 22, 2014
    Assignee: Integran Technologies Inc.
    Inventors: Jared J. Victor, Uwe Erb, Klaus Tomantschger, Nandakumar Nagarajan, Diana Facchini, Mioara Neacsu
  • Publication number: 20140004352
    Abstract: An article of manufacture includes a substrate having an outer surface clad with a metal construct including one or more continuous metal layers, at least one of which is an amorphous layer or a microcrystalline layer having a grain size below 5000 nm. A bonding layer is provided between the substrate and the layered metallic construct so that the bonding layer is in direct contact with the substrate and with the layered metallic construct. The bonding layer is made of a substantially fully cured resin including at least 10% of a rubber. The layered metallic construct has peel strength greater than 10N/cm. Also provided is a process for making the article including coating an article outer surface with a bonding layer and a layered metallic construct. The bonding layer is substantially fully cured before the layered metal construct is bonded to the article. The coated article is annealed.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: Integran Technologies Inc.
    Inventors: Jonathan McCrea, Herath Katugaha, Gino Palumbo, Konstantinos Panagiotopoulos, Iain Brooks, Nandakumar Nagarajan, Gerhard Hirmer
  • Publication number: 20130337288
    Abstract: Free standing articles or articles at least partially coated with substantially porosity free, fine-grained and/or amorphous Co-bearing metallic materials optionally containing solid particulates dispersed therein, are disclosed. The electrodeposited metallic layers and/or patches comprising Co provide, enhance or restore strength, wear and/or lubricity of substrates without reducing the fatigue performance compared to either uncoated or equivalent thickness Cr coated substrate. The fine-grained and/or amorphous metallic coatings comprising Co are particularly suited for articles exposed to thermal cycling, fatigue and other stresses and/or in applications requiring anti-microbial and hydrophobic properties.
    Type: Application
    Filed: August 26, 2013
    Publication date: December 19, 2013
    Applicant: Integran Technologies Inc.
    Inventors: Diana Facchini, Francisco Gonzalez, Jonathan McCrea, Mike Uetz, Gino Palumbo, Klaus Tomantschger, Nandakumar Nagarajan, Jared J. Victor, Uwe Erb
  • Publication number: 20130256944
    Abstract: Super-hydrophobic and self-cleaning articles produced by imprinting exposed surfaces with suitable fine-grained and/or amorphous metallic embossing dies to transfer a dual surface structure, including ultra-fine features less than or equal to 100 nm embedded in and overlaying a surface topography with macro-surface structures greater than or equal to 1 micron are disclosed.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 3, 2013
    Applicant: Integran Technologies Inc.
    Inventors: Jared J. Victor, Uwe Erb, Klaus Tomantschger, Nandakumar Nagarajan, Diana Facchini, Mioara Neacsu
  • Patent number: 8545994
    Abstract: An article includes an electrodeposited metallic material including Co with a minimum content of 75% by weight. The metallic material has a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm and/or an amorphous microstructure. The metallic material forms at least part of an exposed surface of the article. The metallic material has an inherent contact angle for water of less than 90 degrees at room temperature when measured on a smooth exposed surface portion of the metallic material which has a maximum surface roughness Ra of 0.25 microns. The metallic material has an exposed patterned surface portion having surface structures having a height of between at least 5 microns to about 100 microns incorporated therein to increase the contact angle for water at room temperature of the exposed patterned surface portion to over 100 degrees.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: October 1, 2013
    Assignee: Integran Technologies Inc.
    Inventors: Diana Facchini, Francisco Gonzalez, Jonathan McCrea, Mike Uetz, Gino Palumbo, Klaus Tomantschger, Nandakumar Nagarajan, Jared J. Victor, Uwe Erb
  • Patent number: 8486319
    Abstract: Super-hydrophobic and self-cleaning articles produced by imprinting exposed surfaces with suitable fine-grained and/or amorphous metallic embossing dies to transfer a dual surface structure, including ultra-fine features less than or equal to 100 nm embedded in and overlaying a surface topography with macro-surface structures greater than or equal to 1 micron are disclosed.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 16, 2013
    Assignee: Integran Technologies Inc.
    Inventors: Jared J. Victor, Uwe Erb, Klaus Tomantschger, Nandakumar Nagarajan, Diana Facchini, Mioara Neacsu
  • Publication number: 20130112563
    Abstract: Anode applicators include consumable anodes, that can be operated in a non-stationary mode and are insensitive to orientation, are used in selective plating/brush electrodeposition of coatings or free-standing components. The flow-through dimensionally-stable, consumable anodes employed are perforated/porous to provide relatively unimpeded electrolyte flow and operate at low enough electrochemical potentials to provide for anodic metal/alloy dissolution avoiding undesired anodic reactions. The consumable anodes include consumable anode material(s) in high surface area to reduce the local anodic current density. During electroplating, sufficient electrolyte is pumped through the consumable anodes at sufficient flow rates to minimize concentration gradient and/or avoid the generation of chlorine and/or oxygen gas and/or undesired reaction such as the anodic oxidation of P-bearing ions in the electrolyte.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Applicant: INTEGRAN TECHNOLOGIES INC.
    Inventors: Klaus Tomantschger, Diana Facchini, Francisco Gonzalez, Jonathan McCrea, John Kratochwil, Dan Woloshyn, Yusuf Bismilla, Nandakumar Nagarajan, Mioara Neacsu
  • Patent number: 8394507
    Abstract: Metal-clad polymer articles containing structural fine-grained and/or amorphous metallic coatings/layers optionally containing solid particulates dispersed therein, are disclosed. The fine-grained and/or amorphous metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling although the CLTE of the metallic layer and the one of the substrate is mismatched. The interface between the metallic layer and the polymer is suitably pretreated to withstand thermal cycling without failure.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: March 12, 2013
    Assignee: Integran Technologies, Inc.
    Inventors: Klaus Tomantschger, Jonathan McCrea, Nandakumar Nagarajan, Francisco Gonzalez, Gino Palumbo, Konstantinos Panagiotopoulos, Herath Katugaha
  • Publication number: 20120237789
    Abstract: A metal-clad polymer article includes a polymeric material with or without particulate addition. The polymeric material defines a permanent substrate. A metallic material covers at least part of a surface of the polymeric material. The metallic material has a microstructure which, at least in part, is at least one of fine-grained with an average grain size between 2 and 5,000 nm and amorphous. The metallic material has an elastic limit between 0.2% and 15%. At least one intermediate layer can be provided between the polymeric material and the metallic material. A stress on the polymeric material, at a selected operating temperature, reaches at least 60% of its ultimate tensile strength at a strain equivalent to the elastic limit of said metallic material.
    Type: Application
    Filed: October 24, 2011
    Publication date: September 20, 2012
    Applicant: INTEGRAN TECHNOLOGIES INC.
    Inventors: Andrew Wang, Nandakumar Nagarajan, Klaus Tomantschger, Mioara Neacsu
  • Publication number: 20110287203
    Abstract: Super-hydrophobic and self-cleaning articles produced by imprinting exposed surfaces with suitable fine-grained and/or amorphous metallic embossing dies to transfer a dual surface structure, including ultra-fine features less than or equal to 100 nm embedded in and overlaying a surface topography with macro-surface structures greater than or equal to 1 micron are disclosed.
    Type: Application
    Filed: May 24, 2010
    Publication date: November 24, 2011
    Applicant: INTEGRAN TECHNOLOGIES INC.
    Inventors: Jared J. Victor, Uwe Erb, Klaus Tomantschger, Nandakumar Nagarajan, Diana Facchini, Mioara Neacsu