US4970197A
Expired / Lapsed
US
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Oxide superconductor
Assignee: Fujikura Ltd
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Filing: 1988-04-22
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Granted: 1990-11-13
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Expires: 2008-04-22
Abstract
Abstract An oxide superconductor including an oxide superconductor member and a hermetical seal layer, coated over the oxide superconductor member, for hermetically sealing the oxide superconductor member from the atmosphere.
Inventors
- 👤 Takao Shiota
- 👤 Hiroshi Hidaka
- 👤 Koichi Takahashi
- 👤 Masahiro Sato
- 👤 Osamu Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:47
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0661; H10N60/0716; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/704; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An oxide superconductor comprising; (a) a high critical temperature (TC) oxide superconductor member; and (b) a hermetically sealing layer, coated over the oxide superconductor member, for hermetically sealing the oxide superconductor member from the atmosphere wherein the sealing layer is made of a substance selected from the group consisting of Au, Ag, Cu, Al, In, SiO 2 , and SiO 3 N 4 .
Claim 2
Dependent Claim
64 words
An oxide superconductor comprising; (a) a high critical temperature (TC) oxide superconductor member; and (b) a hermetically sealing layer, coated over the oxide superconductor member, for hermetically sealing the oxide superconductor member from the atmosphere wherein the sealing layer is made of a substance selected from the group consisting of Au, Ag, Cu, Al, In, SiO 2 , and SiO 3 N 4 .
Claim 3
Dependent Claim
24 words
An oxide superconductor as recited in claim 1, wherein the thickness of the sealing layer ranges from about 0.1 μm to about 4 μm.
Claim 4
Dependent Claim
90 words
An oxide superconductor as recited in claim 2, wherein the oxide superconductor is represented by a first formula: A x B y Cu z O 9- δ where: A includes at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; B includes at least one element selected from the group consisting of Be, Sr, Mg, Ca, Ba and Ra; about 0.1<x<about 2.0; about 1<y<about 3; about 1<z<about 3; and about 0<δ<about 7.
Claim 5
Dependent Claim
46 words
An oxide superconductor as recited in claim 3, wherein the oxide superconducting member comprises a substrate, and an oxide superconductor layer containing the oxide superconductor and coated over the substrate, the oxide superconductor layer having a thickness of about about 0.01 μm to about 2 μm.
Claim 6
Dependent Claim
26 words
An oxide superconductor as recited in claim 4, further comprising a coating layer coated over the sealing layer for protecting the sealing layer from physical damage.
Claim 7
Dependent Claim
40 words
An oxide superconductor as recited in claim 4, wherein the sealing layer comprises: an amorphous intermediate sealing layer containing the elements A, B, Cu and O; and a vitreous outer sealing layer containing the elements A, B, Cu and 0.
Claim 8
Dependent Claim
101 words
An oxide superconductor as recited in claim 6, wherein the intermediate amorphous sealing layer has a thickness of about 0.1 μm to about 2 μm and comprises an amorphous substance represented by a second formula A x1 B y1 CuO z1 where about 0.2<x1<about 0.6, about 0.3<y1<about 0.7, about 2<z1<about 6, and wherein the outer vitreous sealing layer has a thickness of about 0.2 μm to about 2 μm and comprises a vitreous substance represented by a third formula A x2 B y2 CuSi z2 O v where about 0.2<x2<about 0.5, about 0.9<y2<about 2, about 2<z2<about 4, and about 4<v<about 10.
Claim 9
Dependent Claim
16 words
An oxide superconductor as recited in claim 4, wherein the substrate is made of a fiber.
References Cited (Backward Citations)
USH39H
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |