(19)

(11)

EP 0 629 138 A1

(12)

(43) Date of publication: 21.12.1994 Bulletin 1994/51 (21) Application number: 93905105.0 (22) Date of filing: 04.03.1993

(51) International Patent Classification (IPC):  A62D 3/ 19( . ) C10B 19/ 00( . ) C10B 53/ 00( . ) A62D 101/ 28( . ) A62D 3/ 40( . ) C10B 39/ 04( . ) A62D 101/ 22( . ) (86) International application number: PCT/AU1993/000089 (87) International publication number: WO 1993/017759 (16.09.1993 Gazette 1993/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 04.03.1992 AU 19920001188 (71) Applicants: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Campbell Australian Capital Territory 2601 (AU) SIDDONS RAMSET LIMITED Victoria 3136 (AU)

(72) Inventors: DEAM, Rowan Thomas Briar Hill, VIC 3088 (AU) KEARNEY, Trevor Neil Greensborough, VIC 3088 (AU) OGILVY, Ian Michael North Balwyn, VIC 3104 (AU) MUNDY, Alan Edward Sunbury, VIC 3429 (AU) ZEMANCHEFF, Paul Adrian Essendon, VIC 3040 (AU) VIT, Athos Ivan Elwood, VIC 3184 (AU) (74) Representative: Gordon, Michael Vincent  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)