(19)
(11)
EP 0 366 721 A1
(12)
(43)
Date of publication:
09.05.1990
Bulletin 1990/19
(21)
Application number:
88906653.0
(22)
Date of filing:
08.06.1988
(51)
International Patent Classification (IPC):
C04B
35/
00
( . )
C01G
3/
00
( . )
H01B
12/
00
( . )
H01L
39/
24
( . )
C01G
1/
00
( . )
C04B
35/
45
( . )
H01B
13/
00
( . )
(86)
International application number:
PCT/US1988/002025
(87)
International publication number:
WO 1988/010515
(
29.12.1988
Gazette 1988/28)
(84)
Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE
(30)
Priority:
09.06.1987
US 19870059847
(71)
Applicant:
E.I. DU PONT DE NEMOURS AND COMPANY
Wilmington Delaware 19898 (US)
(72)
Inventor:
TORARDI, Carmine
Wilmington, DE 19803 (US)
(74)
Representative:
Jones, Alan John, et al
CARPMAELS & RANSFORD 43 Bloomsbury Square
London, WC1A 2RA
London, WC1A 2RA (GB)
(54)
IMPROVED PROCESS FOR MAKING 90 K SUPERCONDUCTORS