Patent US3444921A successfully refreshed from Google Patents.
US3287648A
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US
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Variable frequency divider employing plural banks of coincidence circuits and multiposition switches to effect desired division
Assignee: Individual
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Filing: 1964-01-21
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Granted: 1966-11-22
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Lewis A Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/68; H; H03; H03K; H03K23/00; H03K23/64; H03K23/66
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |