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US2679563A
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US
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Electromagnetic switch
Assignee: Individual
•
Filing: 1951-12-03
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Granted: 1954-05-25
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Expires: 1971-12-03
Abstract
No abstract record available.
Inventors
- 👤 Katsumata Akifumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:58
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856; Y10T74/18864; Y10T74/18872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1281392A
Cited
US1559110A
Cited
GB309096A
Cited
US1954365A
Cited
US2236318A
Cited
US2528777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |