Patent US2921166A successfully refreshed from Google Patents.
US2921166A
Expired / Lapsed
US
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Electric relays
Assignee: Clark Controller Co
•
Filing: 1956-01-23
•
Granted: 1960-01-12
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Few William
- 👤 Arald B Pearson
- 👤 Dakers David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:41
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H50/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2514913A
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US2616998A
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US2672536A
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US2743339A
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US2811617A
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |