Patents by Inventor Perumal Pugazhendhi

Perumal Pugazhendhi 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: 10908119
    Abstract: A reference electrode which is stable over a wide range of temperatures, pressures and chemical conditions is provided. The subject reference electrode according to the present invention comprises a tubular enclosure composed of quartz having a distal, closed end and a proximal, open end. An insulating ceramic rod is seemingly connected to the opening in the closed distal end of the enclosure to form micro-cracks between the ceramic rod and the quartz enclosure (called a cracked junction, CJ). The CJ gives a very tortuous path for ion conduction from inside the reference electrode (RE) to a working electrode (WE). Inside the tubular enclosure is an electrical lead (e.g., a silver wire) disposed in an electrolyte comprising a mixture of alkaline metal salts (e.g., AgCl and KCl), extending from the electrolyte upward through a sealing means at the proximal end of the quartz enclosure.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: February 2, 2021
    Assignee: Arizona Board of Regents on Behalf of the University of Arizona
    Inventors: Dominic Gervasio, Hassan Elsentriecy, Perumal Pugazhendhi
  • Publication number: 20200166476
    Abstract: A reference electrode which is stable over a wide range of temperatures, pressures and chemical conditions is provided. The subject reference electrode according to the present invention comprises a tubular enclosure composed of quartz having a distal, closed end and a proximal, open end. An insulating ceramic rod is seemingly connected to the opening in the closed distal end of the enclosure to form micro-cracks between the ceramic rod and the quartz enclosure (called a cracked junction, CJ). The CJ gives a very tortuous path for ion conduction from inside the reference electrode (RE) to a working electrode (WE). Inside the tubular enclosure is an electrical lead (e.g., a silver wire) disposed in an electrolyte comprising a mixture of alkaline metal salts (e.g., AgCl and KCl), extending from the electrolyte upward through a sealing means at the proximal end of the quartz enclosure.
    Type: Application
    Filed: November 21, 2016
    Publication date: May 28, 2020
    Inventors: Dominic Gervasio, Hassan Elsentriecy, Perumal Pugazhendhi
  • Publication number: 20060024546
    Abstract: Fullerene materials are incorporated in minor amounts into various polymeric materials to enhance the low relative humidity proton conductivity properties of the polymeric material. The resulting proton conductors may be used as polymer electrolyte membranes in fuel cells operative over a wide range of relative humidity conditions and over a wide range of temperatures from below room temperature to above the boiling point of water.
    Type: Application
    Filed: June 14, 2005
    Publication date: February 2, 2006
    Inventors: Raouf Loutfy, Perumal Pugazhendhi, Ken Tasaki, Arunkumar Venkatesan
  • Patent number: 6949304
    Abstract: Proton conductive fullerene materials are incorporated in minor amounts into various polymeric materials to enhance the low relative humidity proton conductivity properties of the polymeric material. The resulting proton conductors may be used as polymer electrolyte membranes in fuel cells operative over a wide range of relative humidity conditions and over a wide range of temperatures from below room temperature to above the boiling point of water.
    Type: Grant
    Filed: June 12, 2004
    Date of Patent: September 27, 2005
    Assignees: MC Research & Innovation Center, Materials and Electrochemical Resarch (MER) Corp.
    Inventors: Raouf O. Loutfy, Perumal Pugazhendhi, Ken Tasaki, Arunkumar Venkatesan
  • Publication number: 20050014051
    Abstract: Proton conductive fullerene materials are incorporated in minor amounts into various polymeric materials to enhance the low relative humidity proton conductivity properties of the polymeric material. The resulting proton conductors may be used as polymer electrolyte membranes in fuel cells operative over a wide range of relative humidity conditions and over a wide range of temperatures from below room temperature to above the boiling point of water.
    Type: Application
    Filed: June 12, 2004
    Publication date: January 20, 2005
    Inventors: Raouf Loutfy, Perumal Pugazhendhi, Ken Tasaki, Arunkumar Venkatesan