US3630769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PRODUCTION OF VAPOR-DEPOSITED Nb{11 B{11 Sn CONDUCTOR MATERIAL
Assignee: Plessey Overseas Ltd
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Filing: 1969-04-18
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Granted: 1971-12-28
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Expires: 1989-04-18
Abstract
Abstract Nb3Sn superconductor material of increased critical current density is obtained by carrying out vapor deposition by decomposition of chlorides on a heated corrosion-resistant substrate in the presence of oxygen, for example 0.5 percent oxygen, in a mixed hydrogen and argon gas stream.
Inventors
- 👤 Peter B Hart
- 👤 Christopher Hill
- 👤 Clifford W Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:52
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/06; C23C16/08; H; H10; H10N; H10N60/00; H10N60/01; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/818; Y10S505/819
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
A method as claimed in claim 1, wherein deposition is effected from a gas stream which contains 0.4 to 0.6 volume percent of oxygen.
Claim 2
Dependent Claim
18 words
A method as claimed in claim 2, wherein deposition is effected with the substrate maintained at approximately 800*C.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1, wherein the temperature of the gas stream is maintained above a minimum level that is 100*C. below the temperature of the substrate.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 4, wherein deposition is effected with the substrate maintained at approximately 800*C.
Claim 5
Dependent Claim
48 words
A method as claimed in claim 5, wherein deposition is effected from a gas stream comprising approximately 39 1/2 volume percent of hydrogen, 53 volume percent of argon, 5 volume percent of niobium chloride NbC14, 2 volume percent of tin chloride SnC14, and one-half volume percent of oxygen.
References Cited (Backward Citations)
US3429032A
Cited
US3436258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |