(19)
(11)
EP 0 028 231 A1
(12)
(43)
Date of publication:
13.05.1981
Bulletin 1981/19
(21)
Application number:
80900817.0
(22)
Date of filing:
02.05.1980
(51)
International Patent Classification (IPC):
E01C
19/
10
( . )
F23N
5/
00
( . )
F23N
5/
20
( . )
F23N
1/
02
( . )
F23N
5/
02
( . )
(86)
International application number:
PCT/AU1980/000008
(87)
International publication number:
WO 1980/002453
(
13.11.1980
Gazette 1980/26)
(84)
Designated Contracting States:
AT CH DE FR GB LI NL SE
(30)
Priority:
04.05.1979
AU 19790008680
(71)
Applicant:
K.P. GRAHAM & ASSOCIATES PTY. LTD.
Surrey Hills Victoria 3127 (AU)
(72)
Inventor:
VAN DE VREEDE, John
North Balwyn Victoria 3104 (AU)
(74)
Representative:
Davy, John Raymond, et al
CARPMAELS & RANSFORD 43, Bloomsbury Square
London, WC1A 2RA
London, WC1A 2RA (GB)
(54)
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