Patent US1630274A successfully refreshed from Google Patents.
US2870397A
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Saturable core transformer
Assignee: General Electric Co
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Filing: 1956-10-16
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Granted: 1959-01-20
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Expires: 1976-10-16
Abstract
No abstract record available.
Inventors
- 👤 Fred W Kelley Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:15
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/14; G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; H01F29/143; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/066; H03; H03F; H03F9/00; H03F9/04
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |