Patent US2508486A successfully refreshed from Google Patents.
US2508486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Ambac International Corp
•
Filing: 1946-12-04
•
Granted: 1950-05-23
•
Expires: 1966-12-04
Abstract
No abstract record available.
Inventors
- 👤 Martin J Berlyn
- 👤 Ernest E Stansfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:15
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2147198A
Cited
US865662A
Cited
US955204A
Cited
US1121996A
Cited
US1266811A
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US2268261A
Cited
US2304103A
Cited
US2320942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |