(19)

(11)

EP 0 108 064 A1

(12)

(43) Date of publication: 16.05.1984 Bulletin 1984/20 (21) Application number: 82903572.0 (22) Date of filing: 06.12.1982

(51) International Patent Classification (IPC):  C03B 23/ 025( . ) (86) International application number: PCT/AU1982/000206 (87) International publication number: WO 1983/001942 (09.06.1983 Gazette 1983/14)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 04.12.1981 AU 19810001834 (71) Applicant: CRISP, Peter John Bowning NSW 2583 (AU)	(72) Inventor: CRISP, Peter John Bowning NSW 2583 (AU)