(19)

(11)

EP 3 692 206 A1

(12)

(43) Date of publication: 12.08.2020 Bulletin 2020/33 (21) Application number: 18864422.3 (22) Date of filing: 05.10.2018

(51) International Patent Classification (IPC):  D21H 11/18(2006.01) B32B 29/00(2006.01) D21H 11/12(2006.01) (86) International application number: PCT/IN2018/050632 (87) International publication number: WO 2019/069325 (11.04.2019 Gazette 2019/15)

(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: 06.10.2017 IN 201711035496 (71) Applicant: Council of Scientific and Industrial Research New Delhi 110001 (IN)	(72) Inventors: SHANMUGANATHAN, Kadhiravan Pune Maharashtra 411008 (IN) VENUGOPALAN, Premnath Pune Maharashtra 411008 (IN) AMBONE, Tushar Pune Maharashtra 411008 (IN) (74) Representative: Cabinet Nuss  10, rue Jacques Kablé 67080 Strasbourg Cedex 67080 Strasbourg Cedex (FR)