Patent US2840661A successfully refreshed from Google Patents.
US2840661A
Expired / Lapsed
US
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Magnetic switch device
Assignee: G M Giannini & Co Inc
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Filing: 1955-06-16
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Granted: 1958-06-24
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Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Adriano C Ducati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1875765A
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GB344867A
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US2001579A
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US2029267A
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US2288451A
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US2277215A
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US2264746A
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US2367441A
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US2360941A
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US2497306A
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US2696543A
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US2694117A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |