Patents by Inventor Govindan Sundararajan

Govindan Sundararajan 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: 9365945
    Abstract: A process for forming coatings on metallic web, the process including: immersing at least three metallic webs in an electrolytic solution contained in a reaction chamber; passing wave multiphase alternating current across said metallic webs by using back-to-back thyristors connected in parallel; moving the metallic webs through the electrolytic solution; and removing the coated webs from the reaction chamber.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: June 14, 2016
    Assignee: International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
    Inventors: Lingamaneni Rama Krishna, Nitin Pandurang Wasekar, Govindan Sundararajan
  • Patent number: 8486237
    Abstract: An apparatus for continuously forming thin ceramic coatings on metal sheets, foils or wires. The apparatus has a reaction chamber, perforated nylon sheets, nylon bar guides, copper rods attached to a power supply, nylon collecting rods, and an inlet and an outlet. The reaction chamber is capable of containing an electrolytic solution. The copper rods are separately connected to the R, Y, or B phase of the power supply. Each phase is provided with two thyristors and the output of the thyristors is connected to the copper rods using current transformers. A process for continuously forming thin ceramic coatings on metal sheets, foils or wires is also provided.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: July 16, 2013
    Assignee: International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
    Inventors: Lingamaneni Rama Krishna, Nitin Pandurang Wasekar, Govindan Sundararajan
  • Publication number: 20120305402
    Abstract: A process for forming coatings on metallic web, the process including: immersing at least three metallic webs in an electrolytic solution contained in a reaction chamber; passing wave multiphase alternating current across said metallic webs by using back-to-back thyristors connected in parallel; moving the metallic webs through the electrolytic solution; and removing the coated webs from the reaction chamber.
    Type: Application
    Filed: August 17, 2012
    Publication date: December 6, 2012
    Applicant: International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
    Inventors: Lingamaneni Rama Krishna, Nitin Pandurang Wasekar, Govindan Sundararajan
  • Publication number: 20100163421
    Abstract: An apparatus for continuously forming thin ceramic coatings on metal sheets, foils or wires. The apparatus having a reaction chamber, perforated nylon sheets, nylon bar guides, copper rods attached to a power supply, nylon collecting rods, and an inlet and an outlet. The reaction chamber is capable of containing an electrolytic solution. The copper rods are separately connected to the R, Y, or B phase of the power supply. Each phase is provided with two thyristors and the output of the thyristors is connected to the copper rods using current transformers. A process for continuously forming thin ceramic coatings on metal sheets, foils or wires is also provided.
    Type: Application
    Filed: October 14, 2009
    Publication date: July 1, 2010
    Applicant: International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
    Inventors: Lingamaneni Rama Krishna, Nitin Pandurang Wasekar, Govindan Sundararajan
  • Patent number: 6893551
    Abstract: A process for forming oxide based dense ceramic composite coatings on reactive metal and allow bodies involves suspension of at least two reactive metal or alloy bodies in a non-metallic, non-conducting, non-reactive chamber in such a way that it causes either partial or full immersion of the bodies in a continuously circulating electrolyte. Thyristor controlled, modified shaped wave multiphase alternating current power supply is applied across the bodies where in each body is connected to an electrode. Electric current supplied to the bodies is slowly increased to a particular value till the required current density is achieved and the maintained at the same level throughout the process. Visible arcing at the surface of the immersed regions of the bodies is identified when the applied electric potential crosses 60V. Electric potential is further increased gradually to compensate the increasing resistance of the coating.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: May 17, 2005
    Assignee: International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
    Inventors: Lingamaneni Rama Krishna, Alexander Vasilyevich Rybalko, Govindan Sundararajan
  • Publication number: 20030094377
    Abstract: This invention disclosed in this application relates to a process for forming oxide based dense ceramic composite coatings on reactive metal and alloy bodies. The process involves suspension of at least two reactive metal or alloy bodies in a non-metallic, non-conducting, non-reactive chamber in such a way that it causes either partial or full immersion of the said bodies in a continuously circulating electrolyte. Thyristor controlled, modified shaped wave multiphase alternating current power supply is applied across the said bodies where in each body is connected to an electrode. Electric current supplied to the said bodies where in each body is connected to an electrode. Electric current supplied to the said bodies is slowly increased to a particular value till the required current density is achieved and the maintained at the same level throughout the process. Visible arcing at the surface of the immersed regions of the said bodies is identified when the applied electric potential crosses 60V.
    Type: Application
    Filed: August 2, 2002
    Publication date: May 22, 2003
    Inventors: Lingamaneni Rama Krishna, Alexander Vasilyevich Rybalko, Govindan Sundararajan