US3346467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making long length superconductors
Assignee: National Research Corp
•
Filing: 1964-05-01
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Granted: 1967-10-10
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Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 Lloyd R Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:19
CPC Classifications
C; C22; C22C; C22C1/00; C23; C23C; C23C2/00; C23C2/04; C23C2/08; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD OF PREPARING A SUPECONDUCTIVE NIOBIUM STANNIDE RIBBON COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A NIOBIUM WIRE HAIVNG A LENGTH IN EXCESS OF 3,000 FEET THROUGH A MOLTEN TIN BATH MAINTAINED AT A TEMPERATURE BETWEEN 700*C. AND 900*C. UNDER A CONTAMINANT-FREE ATMOSPHERE WHEREBY THE WIRE IS UNIFORMLY COATED WITH TIN, SUBSEQUENTLY COLD ROLLING THE WIRE TO FLATTEN IT TO A RIBBON HAVING A THICKNESS BETWEEN 1/10 AND 1/3 THE ORIGINAL WIRE DIAMETER AND ROUNDED EDGES, HEAT TREATING THE RIBBON TO REACT THE TIN COATING WITH THE NIOBIUM RIBBON TO FORM A DIFFUSION LAYER OF NIOBIUM STANNIDE AT THE SURFACE OF THE RIBBON WHEREBY THE RIBBON DEMONSTRATES A CRITICAL TEMPERATURE OF ABOUT 18*K. WHEREIN THE TINE COATED WIRE IS SUBJECTED TO AN ELECTROPLATING STEP AFTER DIPPING TO CONTROL THE FINAL THICKNESS OF THE COATING.
Claim 2
Independent Claim
134 words
A METHOD OF PREPARING A SUPECONDUCTIVE NIOBIUM STANNIDE RIBBON COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A NIOBIUM WIRE HAIVNG A LENGTH IN EXCESS OF 3,000 FEET THROUGH A MOLTEN TIN BATH MAINTAINED AT A TEMPERATURE BETWEEN 700*C. AND 900*C. UNDER A CONTAMINANT-FREE ATMOSPHERE WHEREBY THE WIRE IS UNIFORMLY COATED WITH TIN, SUBSEQUENTLY COLD ROLLING THE WIRE TO FLATTEN IT TO A RIBBON HAVING A THICKNESS BETWEEN 1/10 AND 1/3 THE ORIGINAL WIRE DIAMETER AND ROUNDED EDGES, HEAT TREATING THE RIBBON TO REACT THE TIN COATING WITH THE NIOBIUM RIBBON TO FORM A DIFFUSION LAYER OF NIOBIUM STANNIDE AT THE SURFACE OF THE RIBBON WHEREBY THE RIBBON DEMONSTRATES A CRITICAL TEMPERATURE OF ABOUT 18*K. WHEREIN THE TINE COATED WIRE IS SUBJECTED TO AN ELECTROPLATING STEP AFTER DIPPING TO CONTROL THE FINAL THICKNESS OF THE COATING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |