US2961554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic bodies based on barium titanate
Assignee: BRITISH DIELECTRIC RES Ltd
•
Filing: 1958-04-01
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Granted: 1960-11-22
•
Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Cook Ronald Frederick
- 👤 West Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:57
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PIEZO-ELECTRIC TRANSDUCER HAVING A MECHANICAL Q OF AT LEAST 500 AND A COUPLING FACTOR OF AT LEAST 28% COMPRISING A PIEZO-ELECTRIC BODY, OPPOSED ELECTRODES ON SAID BODY AND MEANS FOR TRANSMITTING MECHANICAL VIBRATIONS COUPLED TO SAID BODY, SAID BODY BEING A CERAMIC BODY WHICH ON ANALYSIS YIELDS BAO, CAO, TIO2 AND COO IN QUANTITIES SUCH THAT THE TIO2 CONTENT IS SUBSTANTIALLY STOICHIOMETRIC WITH THE TOTAL CONTENT OF BAO AND CAO, THE RELATION BETWEEN THE BAO AND CAO CONTENTS BEING SUCH AS TO YIELD 0.5% TO 9% BY WEIGHT OF CALCIUM TITANATE, BASED ON THE TOTAL WEIGHT OF BAO, CAO AND TIO2, AND COO CONTENT IS AN AMOUNT UP TO 1% OF THE TOTAL WEIGHT OF BAO, CAO, AND TIO2, SUFFICIENT TO GIVE THE REQUIRED PIEZO-ELECTRIC PROPERTIES TO THE CERAMIC.
Claim 2
Dependent Claim
130 words
A PIEZO-ELECTRIC TRANSDUCER HAVING A MECHANICAL Q OF AT LEAST 500 AND A COUPLING FACTOR OF AT LEAST 28% COMPRISING A PIEZO-ELECTRIC BODY, OPPOSED ELECTRODES ON SAID BODY AND MEANS FOR TRANSMITTING MECHANICAL VIBRATIONS COUPLED TO SAID BODY, SAID BODY BEING A CERAMIC BODY WHICH ON ANALYSIS YIELDS BAO, CAO, TIO2 AND COO IN QUANTITIES SUCH THAT THE TIO2 CONTENT IS SUBSTANTIALLY STOICHIOMETRIC WITH THE TOTAL CONTENT OF BAO AND CAO, THE RELATION BETWEEN THE BAO AND CAO CONTENTS BEING SUCH AS TO YIELD 0.5% TO 9% BY WEIGHT OF CALCIUM TITANATE, BASED ON THE TOTAL WEIGHT OF BAO, CAO AND TIO2, AND COO CONTENT IS AN AMOUNT UP TO 1% OF THE TOTAL WEIGHT OF BAO, CAO, AND TIO2, SUFFICIENT TO GIVE THE REQUIRED PIEZO-ELECTRIC PROPERTIES TO THE CERAMIC.
References Cited (Backward Citations)
US2576379A
Cited
US2758911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |