US2699508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mounting and construction of mounting for low frequency piezoelectric crystals
Assignee: Selectronics Inc
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Filing: 1951-12-21
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Granted: 1955-01-11
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Expires: 1971-12-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick H Fastenau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |