US2951995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for controlling the resonance frequency of an oscillatory circuit
Assignee: US Philips Corp
•
Filing: 1957-09-16
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Granted: 1960-09-06
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Rosier Gerardus
- 👤 Marcel Antoine Arnold Gh Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:14
CPC Classifications
H; H03; H03J; H03J3/00; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1231; H03C; H03C3/00; H03C3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2666902A
Cited
US2778956A
Cited
US2805397A
Cited
US2790088A
Cited
FR1131428A
Cited
US2844795A
Cited
US2764687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |