Patent US3376438A successfully refreshed from Google Patents.
US3376438A
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US
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Piezoelectric ultrasonic transducer
Assignee: Magnaflux Corp
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Filing: 1965-06-21
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Granted: 1968-04-02
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 John R Colbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002; G01; G01B; G01B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2427348A
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US2430013A
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US2458288A
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US2875354A
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US2972068A
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US3166730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |