S. No. Title Inventor Date of filing Patent Application Number Date of Grant Patent Number
21 A Method of and an Apparatus for Continuous Humidification of Hydrogen Delivered to Fuel Cells A.Tangirala , V. Gollangi , B. Viswanthan , K.S.Dhathathreyan 30/03/2007 670/CHE/2007 19/04/2011 247547
22 A Hydrophilic Membrane Based Humidifier useful for Fuel Cells K. S. Dhathathreyan , Ramya Krishnan , J. Sreenivas 16/01/2007 95/DEL/2007 18/01/2018 291871
23 An Improved Process for Preparing Nanotungsten Carbide Powder useful for Fuel Cells K.S. Dhathathreyan , N. Rajalakshmi , T. Narasinga Rao 12/01/2007 81/DEL/2007 22/11/2018 303338
24 An Improved Process for the Preparation of Exfoliated Graphite Separator Plates useful in Fuel Cells, the Plates Prepared by the Process and a Fuel Cell Incorporating the Said Plates K.S. Dhathathreyan , N. Rajalakshmi , S. Pandiyan 17/05/2006 1206/DEL/2006 20/03/2017 281504