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(11)

EP 3 980 389 A1

(12)

(43) Date of publication: 13.04.2022 Bulletin 2022/15 (21) Application number: 19931520.1 (22) Date of filing: 04.11.2019

(51) International Patent Classification (IPC):  C04B 41/48(2006.01) A61L 27/40(2006.01) C04B 35/00(2006.01) A61L 27/34(2006.01) C04B 35/634(2006.01) A61F 2/32(2006.01) (52) Cooperative Patent Classification (CPC): A61F 2/32; A61L 27/34; A61F 2/30767; A61F 2/3094; A61F 2/34; A61F 2/36; A61F 2/3609; A61F 2/3662; A61F 2/367; A61F 2002/3092; A61F 2002/3093; A61F 2002/30968; A61F 2002/30985; A61F 2002/3611; A61F 2002/3654; C04B 35/10; C04B 35/48; C04B 35/447; C04B 35/565; C04B 35/581; C04B 35/185; C04B 35/532; C04B 35/6263; C04B 35/63416; C04B 35/6342; C04B 35/63452; C04B 35/6264; C04B 35/632; C04B 2235/6026; C04B 2235/612; C04B 2235/6021; C04B 35/62635; C04B 2235/6028; C04B 2235/775; A61L 27/446; A61F 2002/30971; C04B 38/0615   C-Sets: C04B 38/0615, C04B 35/00, C04B 38/0074; (86) International application number: PCT/IB2019/059435 (87) International publication number: WO 2020/245645 (10.12.2020 Gazette 2020/50)

(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: 05.06.2019 IN 201931022298 (71) Applicant: Indian Institute Of Technology, Kharagpur Midnapore, West Bengal 721302 (IN)	(72) Inventors: SEESALA, Venkata, Sundeep Kharagpur, West Bengal 721 302 (IN) DHARA, Santanu Kharagpur, West Bengal 721 302 (IN) (74) Representative: Cabinet Nuss  10, rue Jacques Kablé 67080 Strasbourg Cedex 67080 Strasbourg Cedex (FR)