- B. Prem Kumar, R. Uppaluri, D.S. De, M.K. Purkait, "Surfactant composition and method for enhanced oil recovery utilizing above aqueous surfactant composition", Indian Patent, Patent No. 245703, Granted on 04/02/2011.
- Vijaykumar L. Dhadge, Chitta Ranjan Medhi and Mihir Kumar Purkait, Apparatus and method for removal of fluoride, iron, arsenic and microorganism from contaminated drinking water. Indian Patent No. 286481, Granted on 21/08/2017.
- Vijaykumar L. Dhadge and Mihir Kumar Purkait, Method for purification of catechins from natural sources using membrane cell Patent granted on 16/08/2017 subject to NBA approval, (Application no: 240/kol/2010)
- Chitta Ranjan Medhi, Vijaykumar L. Dhadge and Mihir Kumar Purkait, Novel process technology for the production of sodium sulfosuccinic di-octadecyl diester, Application Number: 482/KOL/2010. Date of filing: 29/4/2010.
- Vijaykumar L. Dhadge and Mihir Kumar Purkait, Formulations containing Catechin flavonoids mixture produced by membrane separation technology, Application Number: 840/KOL/2010. Date of filing: 30/7/2010.
- P. Biswas, V.K. Chandaliya, P.K. Banerjee, C. Das, M.K. Purkait, "Development of membrane based technology for the separation of coal from organic solvent", Applied for Indian patent, Application Number: 725/KOL/2010.