US2694789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delayed-action magnetic circuit breaker
Assignee: Heinemann Electric Co
•
Filing: 1950-12-07
•
Granted: 1954-11-16
•
Expires: 1970-12-07
Abstract
No abstract record available.
Inventors
- 👤 Kurt W Wilckens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:42
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/24; H01H71/34; H01H71/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1289656A
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US1437617A
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US1513269A
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US1544138A
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US1730688A
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US2072932A
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US2200109A
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US2360922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |