Patent US3548139A successfully refreshed from Google Patents.
US3548139A
Expired / Lapsed
US
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Electromagnetic relay structure
Assignee: SPX Technologies Inc
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Filing: 1969-12-15
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Granted: 1970-12-15
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Expires: 1989-12-15
Abstract
No abstract record available.
Inventors
- 👤 Wheeler D Maynard
- 👤 Edward A Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:50
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/02; H01H50/04; H01H50/041; H01H50/042; H01H49/00; H01H50/047; H01H50/048; H01H51/00; H01H51/02; H01H51/04; H01H51/06; H01H50/54; H01H50/56; H01H50/58; H01H50/64; H01H50/641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |