Patents by Inventor Vijayamohanan Kunjukrishanapillai

Vijayamohanan Kunjukrishanapillai 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).

  • Process for preparing high surface area carbon
    Patent number: 7799733
    Abstract: The present invention provides a process for making activated carbon having BET surface area up to 2000 m2/g with pore diameter in the range 17-21 ? suitable for fabricating fuel cell and ultracapacitor electrode from coconut shell by treating carbon granules obtained from coconut shells with chemical activating agents like zinc chloride or potassium hydroxide at the room temperature range 500-800° C. in a dynamic flow of gases like N2 or CO2 for 6-24 h followed by a specific cooling pattern to room temperature. Use of such activated carbon enables the fabrication of high performance ultracapacitor electrodes in H2SO4 as exemplified by capacitance values like 180 F/g without the use of any normal metal additives such as RuO2 or IrO2.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: September 21, 2010
    Assignee: Council of Scientific and Industrial Research
    Inventors: Deepali Dattatray Wagh, Girish Vilas Arabale, Mahesh Prakash Kulkarni, Imtiaz Sirajuddin Mulla, Vijayamohanan Kunjukrishanapillai, Subhash Pundalik Vernekar, Ratnesh Kumar Jha, Nalini Edgar Jacob
  • Process for preparing high surface area carbon
    Publication number: 20050221981
    Abstract: The present invention provides a process for making activated carbon having BET surface area upto 2000 m2/g with pore diameter in the range 17-21 ? suitable for fabricating fuel cell and ultracapacitor electrode from coconut shell by treating carbon granules obtained from coconut shells with chemical activating agents like zinc chloride or potassium hydroxide at the room temperature range 500-800° C. in a dynamic flow of gases like N2 or CO2 for 6-24 h followed by a specific cooling pattern to room temperature. Use of such activated carbon enables the fabrication of high performance ultracapacitor electrodes in H2SO4 as exemplified by capacitance values like 180 F/g without the use of any normal metal additives such as RuO2 or IrO2.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 6, 2005
    Inventors: Deepali Wagh, Girish Arabale, Mahesh Kulkarni, Imtiaz Mulla, Vijayamohanan Kunjukrishanapillai, Subhash Vernekar, Ratnesh Jha, Nalini Jacob