US3574573A
Expired / Lapsed
US
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Composite superconductor with layers of vanadium material and gallium material
Assignee: National Institute for Materials Science
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Filing: 1967-06-19
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Granted: 1971-04-13
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Expires: 1987-06-19
Abstract
Abstract A SUPERCONDUCTOR CONSISTING OF A VANADIUM SUBSTRATE OF WIRE OR TAPE FORM AND AN OVERLYING LAYER OF SUPERCONDUCTIVE V3GA INTERMETALLIC COMPOUND. A METHOD FOR MANUFACTURING SUCH SUPERCONDUCTOR, COMPRISING THE STEPS OF FORMING A LAYER OF INTERMEDIATE COMPOUNDS RICHER IN GALLIUM ON THE SURFACE OF A VANADIUM SUBSTRATE HAVING SAID FORM THROUGH A REACTION BETWEEN THE VANADIUM SUBSTRATE AND THE SURROUNDING MOLTEN GALLIUM AT A TEMPERATURE BETWEEN 500*C. AND 800*C., AND OF CONVERTING SAID PHASE TO V3GA AT A TEMPERATURE BETWEEN 600*C. AND 850*C. AN APPARATUS BEST SUITED FOR PRACTICING SAID METHOD IN THE MANUFACUTE OF SUCH SUPERCONDUCTOR.
Inventors
- 👤 Kyoji Tachikawa
- 👤 Yoshiaki Tanaka
- 👤 Satoshi Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:40
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/818; Y10S505/819; Y10S505/821; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12681; Y10T428/12708; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |