Patent US2914707A successfully refreshed from Google Patents.
US2914707A
Expired / Lapsed
US
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Circuit breaker structure with improved interlocking mechanism for protecting operating personnel
Assignee: Allis Chalmers Corp
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Filing: 1956-03-29
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Granted: 1959-11-24
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Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Julius W Timmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:38
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133; H02B13/00; H02B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |