US2490103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker with temperature compensation
Assignee: John B. Pierce Laboratory
•
Filing: 1944-01-08
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Granted: 1949-12-06
•
Expires: 1964-01-08
Abstract
No abstract record available.
Inventors
- 👤 Jr William E Stilwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/64; H01H50/68; H01H77/00; H01H77/02; H01H77/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1897316A
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US1655967A
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US2057380A
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US2203558A
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US2309207A
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US2207422A
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US2335888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |