(19)

(11)

EP 0 859 885 A1

(12)

(43) Date of publication: 26.08.1998 Bulletin 1998/35 (21) Application number: 96936596.0 (22) Date of filing: 18.10.1996

(51) International Patent Classification (IPC):  C01F 11/ 18( . ) C09C 3/ 10( . ) D21H 17/ 67( . ) C09C 1/ 02( . ) D21H 17/ 69( . ) (86) International application number: PCT/US1996/016606 (87) International publication number: WO 1997/014847 (24.04.1997 Gazette 1997/18)

(84) Designated Contracting States: DE DK FI FR GB IE SE (30) Priority: 20.10.1995 US 19950546145 (71) Applicant: ECC INTERNATIONAL INC. Roswell, GA 30076 (US)	(72) Inventor: WU, Kuan-Ting Tuku, Yunlin 633 (TW) (74) Representative: McCormack, Derek James  ECC International Ltd, Patents Department, c/o John Keay House St Austell, Cornwall PL25 4DJ St Austell, Cornwall PL25 4DJ (GB)