US2816987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload tripping switch
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1954-12-22
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Granted: 1957-12-17
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Hagdahl Ernst Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:33
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1009; H01H71/1027; H01H73/00; H01H73/22; H01H73/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2091941A
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US2015633A
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US2065357A
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US2170412A
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FR49051E
Cited
US2623967A
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US2653202A
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US2666828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |