Patent US3474268A successfully refreshed from Google Patents.
US3474268A
Expired / Lapsed
US
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Piezoelectric ceramic transducer
Assignee: Gulton Industries Inc
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Filing: 1966-04-21
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Granted: 1969-10-21
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Norman Rudnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:40
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/581; H04; H04R; H04R17/00; H10; H10N; H10N30/00; H10N30/20; H10N30/204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860529A
Cited
US2269403A
Cited
US2451966A
Cited
US3115588A
Cited
US3258617A
Cited
US3378704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |