Patent US2522731A successfully refreshed from Google Patents.
US2522731A
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US
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Elongated coil time delay network
Assignee: Hazeltine Research Inc
•
Filing: 1945-10-23
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Granted: 1950-09-19
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Expires: 1965-10-23
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:42
CPC Classifications
H; H01; H01P; H01P9/00; H01P9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2360265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |