US3428925A
Expired / Lapsed
US
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Superconductor having insulation at its exterior surface with an intermediate normal metal layer
Assignee: Siemens AG
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Filing: 1967-02-16
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Granted: 1969-02-18
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Gunther Bogner
- 👤 Richard Dotzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:33
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/54; C25D3/42; C25D3/44; H; H01; H01B; H01B3/00; H01B3/02; H01B3/10; H01F; H01F6/00; H01F6/06; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/88; Y10S505/884; Y10S505/885; Y10S505/887
Claims Analysis
Total Claims: 0
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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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |