Patent US2897407A successfully refreshed from Google Patents.
US2897407A
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Negative-phase-sequence responsive apparatus
Assignee: General Electric Co
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Filing: 1953-11-03
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Granted: 1959-07-28
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 William C Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:42
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/32; H02H3/34; H02H3/343
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726928A
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US2161829A
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US2315470A
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US2381527A
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US2309649A
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US2456976A
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US2516022A
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US2516025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |