US2645689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker with extended contact travel
Assignee: DTE Energy Co
•
Filing: 1948-07-15
•
Granted: 1953-07-14
•
Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 George A Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US551635A
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US732564A
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US836994A
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US860433A
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DE462425C
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US2333604A
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US2318030A
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US2491265A
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US2534920A
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US2539213A
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US2541917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |