Patent US3421330A successfully refreshed from Google Patents.
US3421330A
Expired / Lapsed
US
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Thermomagnetic transfer of heat through a superconductor
Assignee: RTX Corp
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Filing: 1967-04-17
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Granted: 1969-01-14
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Expires: 1987-04-17
Abstract
No abstract record available.
Inventors
- 👤 Fred A Otter Jr
- 👤 Peter R Solomon
- 👤 George B Yntema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:22
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/02; F; F25; F25B; F25B21/00; H10; H10N; H10N60/00; H10N60/80; F25B2321/00; F25B2321/002; F25B2321/0021; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2913881A
Cited
US3154927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |