Patent US104275A successfully refreshed from Google Patents.
US2907945A
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Transformer with magnetic shunt control
Assignee: Welding Industry Res & Patent
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Filing: 1954-12-13
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Granted: 1959-10-06
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Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 Ronald F Brennen
- 👤 James A Bucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/06; H01F29/14; H01F29/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR819223A
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US2138732A
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US2179795A
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FR836114A
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US2214864A
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US2447955A
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US2484959A
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US2569468A
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US2658132A
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US2692954A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |