US2824189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic switching device
Assignee: General Electric Co
•
Filing: 1955-10-17
•
Granted: 1958-02-18
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 John S Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:20
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1053340A
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US1859934A
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US1763003A
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US1858876A
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US1886372A
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US2351588A
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GB572686A
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US2531905A
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US2767280A
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US2718568A
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US2777922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |