Patent US2428012A successfully refreshed from Google Patents.
Patent US2949538A successfully refreshed from Google Patents.
US2949538A
Expired / Lapsed
US
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Electrical switching circuits
Assignee: The General Electric Company PLC
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Filing: 1957-07-02
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Granted: 1960-08-16
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Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Tomlinson Terence Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:39
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/42; G; G11; G11C; G11C19/00; G11C19/30; H03K17/00; H03K17/51; H03K17/78; H03K21/00; H03K23/00; H03K23/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |