(19)

(11)

EP 0 460 029 A1

(12)

(43) Date of publication: 11.12.1991 Bulletin 1991/50 (21) Application number: 90903717.0 (22) Date of filing: 23.02.1990

(51) International Patent Classification (IPC):  G01N 7/ 00( . ) G01N 7/ 12( . ) G01N 25/ 22( . ) G01N 25/ 32( . ) G01N 27/ 18( . ) G01N 7/ 10( . ) G01N 25/ 20( . ) G01N 25/ 30( . ) G01N 27/ 16( . ) G01N 33/ 00( . ) (86) International application number: PCT/AU1990/000076 (87) International publication number: WO 1990/010212 (07.09.1990 Gazette 1990/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 23.02.1989 AU 19890002893 (71) Applicant: BURRELL, Leonard Ian Oatley, New South Wales 2223 (AU)	(72) Inventor: BURRELL, Leonard Ian Oatley, New South Wales 2223 (AU) (74) Representative: Price, Paul Anthony King, et al  D. Young & Co., 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)