Patent US2653236A successfully refreshed from Google Patents.
US2653236A
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US
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Frequency dividing circuit
Assignee: Individual
•
Filing: 1946-04-02
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Granted: 1953-09-22
•
Expires: 1966-04-02
Abstract
No abstract record available.
Inventors
- 👤 John K Phelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:06
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2113011A
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US2193850A
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US2254087A
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US2221452A
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US2413440A
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US2416158A
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US2398097A
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US2411648A
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US2411573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |