Patent US2870858A successfully refreshed from Google Patents.
US2870858A
Expired / Lapsed
US
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Noise reduction in transformers
Assignee: General Electric Co
•
Filing: 1956-05-10
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Granted: 1959-01-27
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Crawford M Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:22
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1846887A
Cited
US2020119A
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US2372822A
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FR913294A
Cited
US2494343A
Cited
US2526048A
Cited
GB714524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |