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US2716218A
Expired / Lapsed
US
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Frequency variation circuit
Assignee: RCA Corp
•
Filing: 1952-06-06
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Granted: 1955-08-23
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Expires: 1972-06-06
Abstract
No abstract record available.
Inventors
- 👤 Arsem Alvan Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2321269A
Cited
US2382198A
Cited
US2445508A
Cited
US2521694A
Cited
US2474261A
Cited
US2566405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |