US3509502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay structure
Assignee: SPX Technologies Inc
•
Filing: 1967-11-07
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Granted: 1970-04-28
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Expires: 1987-11-07
Abstract
No abstract record available.
Inventors
- 👤 Wheeler D Maynard
- 👤 Edward A Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:28
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/02; H01H50/04; H01H50/047; H01H50/048; H01H49/00; H01H50/041; H01H50/042; 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)
US990032A
Cited
US2134448A
Cited
US2556716A
Cited
US3001049A
Cited
US3076880A
Cited
US3270301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |