Patent US2935585A successfully refreshed from Google Patents.
US2935585A
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US
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Polarized electromagnetic relay
Assignee: Sigma Instruments Inc
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Filing: 1957-04-22
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Granted: 1960-05-03
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Waldo H Holcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:24
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE654405C
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US2135809A
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US2412123A
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US2678360A
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US2774920A
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US2756380A
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US2764652A
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US2794178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |