US3187246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective relay circuitry for hoist motor controls
Assignee: Elkem Metals Co LP
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Filing: 1961-04-19
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Granted: 1965-06-01
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Expires: 1981-04-19
Abstract
No abstract record available.
Inventors
- 👤 Harry G Garten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:16
CPC Classifications
B; B66; B66C; B66C15/00; B66C2700/00; B66C2700/08; B66C2700/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |