US2471168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for converting a signal of variable amplitude into pulses of constant frequency and variable duration
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-11-22
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Granted: 1949-05-24
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Posthumus Klaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:45
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1712993A
Cited
US2121117A
Cited
US2269151A
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US2284101A
Cited
US2413440A
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US2392632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |