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US2986223A
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US
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Follow-up system
Assignee: Cook Electric Co
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Filing: 1956-05-10
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Granted: 1961-05-30
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Donald C Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:40
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445; G05D3/1463; B; B64; B64C; B64C11/00; B64C11/30; B64C11/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2322114A
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US2382847A
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US2478279A
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US2543077A
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US2551306A
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US2517703A
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US2669312A
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US2708258A
Cited
US2747141A
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US2878426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |