US3218693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making niobium stannide superconductors
Assignee: National Research Corp
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Filing: 1962-07-03
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Granted: 1965-11-23
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Expires: 1982-07-03
Abstract
No abstract record available.
Inventors
- 👤 Lloyd R Allen
- 👤 Dilip K Das
- 👤 Robert A Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; H; H10; H10N; H10N60/00; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S428/9335; Y10S428/941; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/818; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921; Y10S505/924; Y10S505/928; Y10S505/93; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12708; Y10T428/12771; Y10T428/12806; Y10T428/12819
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A METHOD OF PREPARING THIN SUPERCONDUCTING LAYERS OF NB3SN COMPRISING THE STEPS OF BRAIDING NIOBIUM WIRES, AT LEAST OF SOME WIRES BEING COATED WITH A THIN FILM OF TIN, TIGHTLY ENCLOSING SAID BRAID IN A DUCTILE CYLINDER, COLD WORKING SAID CYLINDER TO REDUCE ITS DIAMETER SUBSTANTIALLY AND SUBSEQUENTLY HEATING SAID CYLINDER TO DIFFUSE AND REACT THE TIN AND NIOBIUM AT THEIR INTER FACES TO THEREBY PRODUCE SEVERAL THIN DIFFUSION LAYERS OF NB3SN.
Claim 2
Independent Claim
72 words
A METHOD OF PREPARING THIN SUPERCONDUCTING LAYERS OF NB3SN COMPRISING THE STEPS OF BRAIDING NIOBIUM WIRES, AT LEAST OF SOME WIRES BEING COATED WITH A THIN FILM OF TIN, TIGHTLY ENCLOSING SAID BRAID IN A DUCTILE CYLINDER, COLD WORKING SAID CYLINDER TO REDUCE ITS DIAMETER SUBSTANTIALLY AND SUBSEQUENTLY HEATING SAID CYLINDER TO DIFFUSE AND REACT THE TIN AND NIOBIUM AT THEIR INTER FACES TO THEREBY PRODUCE SEVERAL THIN DIFFUSION LAYERS OF NB3SN.
Claim 3
Dependent Claim
40 words
AN IMPROVED METHOD OF MAKING AN ELONGATED SUPERCONDUCTOR MEMBER CONTAINING THE SUPERCONDUCTIVE COMPOUND, NIOBIUM STANNIDE, IN THE FORM OF AT LEAST ONE THIN LAYER RUNNING CONTINUOUSLY THROUGH THE USABLE LENGTH OF THE MEMBER AND WHICH IS BENDABLE INTO DESIRED SHAPES
Claim 4
Dependent Claim
40 words
AN IMPROVED METHOD OF MAKING AN ELONGATED SUPERCONDUCTOR MEMBER CONTAINING THE SUPERCONDUCTIVE COMPOUND, NIOBIUM STANNIDE, IN THE FORM OF AT LEAST ONE THIN LAYER RUNNING CONTINUOUSLY THROUGH THE USABLE LENGTH OF THE MEMBER AND WHICH IS BENDABLE INTO DESIRED SHAPES
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |