US3684715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric oxide materials
Assignee: Toshiba Corp
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Filing: 1971-03-31
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Granted: 1972-08-15
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Expires: 1991-03-31
Abstract
Abstract A BASIC TERNARY PIEZOELECTRIC OXIDE MATERIAL CONSISTING OF 0.5 TO 50 MOL PERCENT PB(ME1/2TE1/2)O3 (ME DENOTES AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF NI, CO AND MN), 30.0 TO 60.0 MOL PERCENT PBTIO3 AND 15.0 TO 55.0 MOL PERCENT PBZRO3 AND ANOTHER TYPE OF PIEZOELECTRIC OXIDE MATERIAL WHEREIN 20.0 ATOM PERCENT MAX. OF THE PB IN SAID BASIC TERNARY OXIDE PIEZOELECTRIC MATERIAL IS SUBSTITUTED BY AT LEAST ONE METAL ELEMENT SELECTED FROM THE GROUP CONSISTING OF BA, SR AND CA.
Inventors
- 👤 Noboru Ichinose
- 👤 Harutoshi Egami
- 👤 Katsunori Yokoyama
- 👤 Yohachi Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |