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Patent US2552137A successfully refreshed from Google Patents.
US2552137A
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Time-delay relay system
Assignee: General Electric Co
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Filing: 1948-09-08
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Granted: 1951-05-08
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Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Maurice E Bivens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:10
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; B; B23; B23K; B23K11/00; B23K11/24; B23K11/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2264067A
Cited
US2348862A
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US2370727A
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US2484575A
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US2471834A
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US2422020A
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US2404773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |