US3523200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave piezoelectric resonator
Assignee: Westinghouse Electric Corp
•
Filing: 1968-02-28
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Granted: 1970-08-04
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Expires: 1988-02-28
Abstract
No abstract record available.
Inventors
- 👤 William E Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02535; H03H9/02543; H03H9/02566; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23813E
Cited
US2974296A
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US2943278A
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US3165651A
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US2969512A
Cited
US3114849A
Cited
US3252017A
Cited
US3401275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |