Patent US2668232A successfully refreshed from Google Patents.
US2668232A
Expired / Lapsed
US
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Frequency controlling system
Assignee: RCA Corp
•
Filing: 1945-05-15
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Granted: 1954-02-02
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Expires: 1965-05-15
Abstract
No abstract record available.
Inventors
- 👤 Tunick Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:43
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/34; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/047; H03L; H03L7/00; H03L7/02; H03L7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2462857A
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US2400648A
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US2425013A
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US2401355A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |