US3699045A
Expired / Lapsed
US
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Piezoelectric ceramic-material
Assignee: NEC Corp
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Filing: 1967-12-22
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Granted: 1972-10-17
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Expires: 1987-12-22
Abstract
Abstract A PIEZOELECTRIC CERAMIC MATERIAL IS PROVIDED CONSISTING ESSENTIALLY OF SOLID SOLUTION OF THE THREE COMPONENTS PB(MN1/3Z2/3)O3, PBTIO3 AND PBZRO3, WHEREIN Z REPRESENTS ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF NB, TA, SB AND BI.
Inventors
- 👤 Norio Tsubouchi
- 👤 Masao Takahashi
- 👤 Tomeji Ohno
- 👤 Tsuneo Akashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/50; C04B35/01; C04B35/46; C04B35/48; 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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |