US2813177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: KELMAN ELECTRIC AND MANUFACTURING Co
•
Filing: 1954-03-29
•
Granted: 1957-11-12
•
Expires: 1974-03-29
Abstract
No abstract record available.
Inventors
- 👤 Elmer T Eberhard
- 👤 Eklund Eyvind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:52
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/34; H01H33/70; H01H33/88; H01H33/90; H01H33/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US901967A
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US1498714A
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US1530120A
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US1708695A
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US1820928A
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US1965551A
Cited
US2258376A
Cited
US2239554A
Cited
US2262516A
Cited
US2653204A
Cited
US2611846A
Cited
US2668217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |