US3560880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal oscillator with automatic compensation for frequency drift due to aging
Assignee: United States Department of the Navy
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Filing: 1968-12-23
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Granted: 1971-02-02
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Expires: 1988-12-23
Abstract
Abstract A HIGHLY STABLE CRYSTAL OSCILLATOR FOR KEEPING TIME PRECISELY WHEREIN THE FREQUENCY DRIFT DUE TO AGING OF A QUARTZ CRYSTAL IS COMPENSATED BY A PROGRAMMED ELECTROMECHANICAL TUNING DEVICE.
Inventors
- 👤 Roger L Easton
- 👤 Charles A Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:20
CPC Classifications
H; H03; H03L; H03L1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |