US3404297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo-electric crystal circuit arrangements
Assignee: BAE Systems Electronics Ltd
•
Filing: 1966-03-31
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Granted: 1968-10-01
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Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 Fewings David John
- 👤 Pipe Harvey Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:26
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03L; H03L1/00; H03L1/02; H03L1/022; H03L1/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286437A
Cited
US3176244A
Cited
US3260960A
Cited
GB1020080A
Cited
US3324415A
Cited
US3302138A
Cited
US3297961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |