US2769962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling means for laminated magnetic cores
Assignee: British Thomson Houston Co Ltd
•
Filing: 1953-07-01
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Granted: 1956-11-06
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Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 William S Melville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:12
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513420A
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US1878173A
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US2326151A
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US2326152A
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US2547065A
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US2547045A
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US2569468A
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US2601240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |