US4959348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Y-Ba-Cu-O superconductor for containing antimony or boron to increase current density
Assignee: Toshiba Corp
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Filing: 1988-11-09
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Granted: 1990-09-25
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Expires: 2008-11-09
Abstract
Abstract A superconductor essentially comprises a three-component metallic oxide including yttrium, barium, and copper (Y-Ba-Cu three-component metallic oxide) and an oxide of an element having a melting point lower than that of the three-component metallic oxide and having 0.1 to 5.0 wt % in form of the oxide thereof. The element is preferably of bismuth, antimony, boron, lead, and praseodymium.
Inventors
- 👤 Kouji Higashibata
- 👤 Hironori Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4521; C04B35/4504; Y; Y10; Y10S; Y10S505/00; Y10S505/775
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
In a superconductor formed by sintering (Y 2 O 3 ), BaO), and (CuO), the improvement comprising: admixing prior to sintering an oxide of antimony or boron such that the superconductor resulting from said sintering contains from 0.1 to 5 wt.% antimony or boron as the oxide thereof.
Claim 2
Dependent Claim
48 words
In a superconductor formed by sintering (Y 2 O 3 ), BaO), and (CuO), the improvement comprising: admixing prior to sintering an oxide of antimony or boron such that the superconductor resulting from said sintering contains from 0.1 to 5 wt.% antimony or boron as the oxide thereof.
Claim 3
Dependent Claim
30 words
The superconductor of claim 1, wherein said powders are admixed in a ratio of 0.5 moles (Y 2 O 3 ), one mole of (BaO) and 3.0 moles of (CuO).
References Cited (Backward Citations)
US4540677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |