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EP 4 058 405 A1

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(43) Date of publication: 21.09.2022 Bulletin 2022/38 (21) Application number: 20887102.0 (22) Date of filing: 03.01.2020

(51) International Patent Classification (IPC):  C01B 32/158(2017.01) C01B 32/198(2017.01) C08L 83/04(2006.01) B82Y 30/00(2011.01) H05K 9/00(2006.01) C08G 77/04(2006.01) (52) Cooperative Patent Classification (CPC): B82Y 30/00; C01B 32/158; C01B 32/198; C08G 77/04; C08L 83/04; H05K 9/0083; C08K 3/042; C08K 3/22   C-Sets: C08K 3/042, C08L 83/04; C08K 3/22, C08L 83/04; (86) International application number: PCT/IB2020/050030 (87) International publication number: WO 2021/094836 (20.05.2021 Gazette 2021/20)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 14.11.2019 IN 201911046464 (71) Applicants: Ministry of Electronics & Information Technology (MEITY) New Delhi 110003 (IN) Mahatma Gandhi University Kottayam, Kerala 686560 (IN)

(72) Inventors: RAJALAKSHMAN PAI, Avinash Kottayam, Kerala 686005 (IN) THOMAS, Sabu Kottayam, Kerala 686560 (IN) KALARIKKAL, Nandakumar Kottayam, Kerala 686560 (IN) (74) Representative: J A Kemp LLP  80 Turnmill Street London EC1M 5QU London EC1M 5QU (GB)