Patent US3209176A successfully refreshed from Google Patents.
US3209176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric vibration transducer
Assignee: Ambac International Corp
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Filing: 1961-06-16
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Granted: 1965-09-28
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred I Paley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:34
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/581; H03H9/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A DEVICE OF THE CHARACTER DESCRIBED, A PIEZOELECTRIC TRANSDUCER INCLUDING TWO OUTER ELECTRODES AND A CENTRAL ELECTRODE, FIRST PIEZOELECTRIC MATERIAL BETWEEN ONE OF SAID OUTER ELECTRODES AND SAID CENTRAL ELECTRODE, SECOND PIEZOELECTRIC MATERIAL BETWEEN THE OTHER OF SAID OUTER ELECTRODES AND SAID CENTRAL ELECTRODE, SAID FIRST AND SECOND PIEZOELECTRIC MATERIALS BEING ORIENTED SO THAT LIKE POLARITY SURFACES ARE IN CONTACT WITH SAID CENTRAL ELECTRODE, MEANS FOR ELECTRICALLY CONNECTING SAID OUTER ELECTRODES TOGETHER AND MEANS FOR APPLYING AN ELECTRICAL FIELD BETWEEN SAID OUTER AND CENTRAL ELECTRODES, AND A METALLIC PLATELIKE MEMBER, SAID TRANSDUCER BEING LOCATED IN A RECESS IN THE SURFACE OF SAID MEMBER WITH AT LEAST ONE OF SAID OUTER ELECTRODRS BEING ANNULAR PLATES.
Claim 2
Dependent Claim
115 words
IN A DEVICE OF THE CHARACTER DESCRIBED, A PIEZOELECTRIC TRANSDUCER INCLUDING TWO OUTER ELECTRODES AND A CENTRAL ELECTRODE, FIRST PIEZOELECTRIC MATERIAL BETWEEN ONE OF SAID OUTER ELECTRODES AND SAID CENTRAL ELECTRODE, SECOND PIEZOELECTRIC MATERIAL BETWEEN THE OTHER OF SAID OUTER ELECTRODES AND SAID CENTRAL ELECTRODE, SAID FIRST AND SECOND PIEZOELECTRIC MATERIALS BEING ORIENTED SO THAT LIKE POLARITY SURFACES ARE IN CONTACT WITH SAID CENTRAL ELECTRODE, MEANS FOR ELECTRICALLY CONNECTING SAID OUTER ELECTRODES TOGETHER AND MEANS FOR APPLYING AN ELECTRICAL FIELD BETWEEN SAID OUTER AND CENTRAL ELECTRODES, AND A METALLIC PLATELIKE MEMBER, SAID TRANSDUCER BEING LOCATED IN A RECESS IN THE SURFACE OF SAID MEMBER WITH AT LEAST ONE OF SAID OUTER ELECTRODRS BEING ANNULAR PLATES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |