(19)

(11)

EP 0 232 290 A1

(12)

(43) Date of publication: 19.08.1987 Bulletin 1987/34 (21) Application number: 86904044.0 (22) Date of filing: 03.07.1986

(51) International Patent Classification (IPC):  B01D 46/ 02( . ) B01D 46/ 06( . ) (86) International application number: PCT/AU1986/000189 (87) International publication number: WO 1987/000075 (15.01.1987 Gazette 1987/01)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 03.07.1985 AU 19850001306 (71) Applicant: JAMES HOWDEN AUSTRALIA PTY. LIMITED North Sydney N.S.W. 2060 (AU)	(72) Inventor: STEPHENSON, Robert, George Panania, NSW 2213 (AU) (74) Representative: Smith, Norman Ian, et al  F.J. CLEVELAND & COMPANY 40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)