US3444307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for superconductive or cryogenic structures
Assignee: Siemens AG
•
Filing: 1967-03-21
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Granted: 1969-05-13
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Expires: 1987-03-21
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Kafka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
H; H01; H01B; H01B12/00; H01B12/16; H01F; H01F27/00; H01F27/28; H01F27/2876; H01F36/00; H01F6/00; H01F6/06; H10; H10N; H10N60/00; H10N60/30; H10N60/35; H10N60/355; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3066499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |