Patent US3661781A successfully refreshed from Google Patents.
US3661781A
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US
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Oxide piezoelectric material
Assignee: Toshiba Corp
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Filing: 1970-02-24
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Granted: 1972-05-09
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Expires: 1990-02-24
Abstract
Abstract AN OXIDE PIEZEOLECTRIC MATERIAL ESSENTIALLY CONSISTING OF 50.0 TO 1.0 MOL PERCENT OF PB(CD1/3-$NB2/3)O3, 34.0 TO 55.5 MOL PERCENT OF PBTIO3 AND 16.0 TO 53.3 MOL PERCENT OF PBZRO3 ASSUMING THE FORM OF SOLID SOLUTION. THE MATERIAL MAY FURTHER CONTAIN AT LEAST ONE OF MNO2, CR2O3, NIO, COO, LA2O3, BI2O3, THO2 AND CEO2.
Inventors
- 👤 Noboru Ichinose
- 👤 Harutoshi Egami
- 👤 Katsunori Yokoyama
- 👤 Yoshikazu Tanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:46
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C04B35/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |