Patent US2918557A successfully refreshed from Google Patents.
US2918557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: RT&E Corp
•
Filing: 1958-05-15
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Granted: 1959-12-22
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Expires: 1978-05-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:23
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/10; H01H9/102; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1058143A
Cited
US2281073A
Cited
US2294766A
Cited
US2351969A
Cited
US2421236A
Cited
US2663825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |