Patent US2464045A successfully refreshed from Google Patents.
US2464045A
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US
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Frequency control device
Assignee: Individual
•
Filing: 1947-03-20
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Granted: 1949-03-08
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Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Walter E Kuenstler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:27
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/34; H01F27/36; H01F27/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1697967A
Cited
US1609744A
Cited
US1861371A
Cited
US1846289A
Cited
US1906106A
Cited
US1917995A
Cited
US2240450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |