Patent US2789217A successfully refreshed from Google Patents.
US2789217A
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Frequency dividing electrical circuit
Assignee: AT&T Inc
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Filing: 1951-08-03
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Granted: 1957-04-16
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Expires: 1971-08-03
Abstract
No abstract record available.
Inventors
- 👤 Lester Y Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
H; H03; H03K; H03K25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2185363A
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US2250202A
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US2405237A
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US2489824A
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US2402053A
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US2551771A
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US2411573A
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US2549022A
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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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |