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(11)

EP 1 687 453 A1

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(43) Date of publication: 09.08.2006 Bulletin 2006/32 (21) Application number: 03772457.2 (22) Date of filing: 18.11.2003

(51) International Patent Classification (IPC):  C14C 1/06(2006.01) (86) International application number: PCT/IB2003/005210 (87) International publication number: WO 2005/049871 (02.06.2005 Gazette 2005/22)

(84) Designated Contracting States: DE ES FR GB IT (71) Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH New Delhi 110 001 (IN)

(72) Inventors: SUBRAMANI, S., c/o Central Leather Research Instit 600 020 Chennai (IN) PALANISAMY, T., c/o Central Leather Research Insti 600 020 Chennai (IN) RAO, J., c/o Central Leather Research Institut 600 020 Chennai (IN) NAIR, B., c/o Central Leather Research Institute 600 020 Chennai (IN) THIRUMALACHARI, R., c/o Ctr.Leather esearch Instit 600 020 Chennai (IN) (74) Representative: Smyth, Gyles Darren et al Marks & Clerk 90 Long Acre London WC2E 9RA London WC2E 9RA (GB)