(19)
(11)
EP 0 635 137 A1
(12)
(43)
Date of publication:
25.01.1995
Bulletin 1995/04
(21)
Application number:
94902231.0
(22)
Date of filing:
11.11.1993
(51)
International Patent Classification (IPC):
G05D
23/
20
( . )
H03L
1/
04
( . )
(86)
International application number:
PCT/US1993/010932
(87)
International publication number:
WO 1994/011763
(
26.05.1994
Gazette 1994/12)
(84)
Designated Contracting States:
DE DK FR GB IT NL
(30)
Priority:
13.11.1992
US 19920975882
(71)
Applicant:
WESTERN ATLAS INTERNATIONAL, INC.
Houston, TX 77042-3115 (US)
(72)
Inventor:
JONES, Kenneth, L.
Houston, TX 77041 (US)
(74)
Representative:
Godsill, John Kenneth, et al
Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane
London WC2A 1AT
London WC2A 1AT (GB)
(54)
HIGH TEMPERATURE STABILIZED TIME BASE