Patent US2903537A successfully refreshed from Google Patents.
US2903537A
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US
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Twin coil electromagnetic actuator
Assignee: Allen Bradley Co LLC
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Filing: 1956-07-30
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Granted: 1959-09-08
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Leland E Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H50/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1488134A
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US1691203A
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FR640233A
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US2378162A
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US2411374A
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US2481431A
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US2434096A
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US2579560A
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US2528932A
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US2687502A
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US2623920A
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US2692314A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |