Patent US3591504A successfully refreshed from Google Patents.
US3591504A
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US
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Ferroelectric composition
Assignee: Clevite Corp
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Filing: 1967-12-18
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Granted: 1971-07-06
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Expires: 1987-12-18
Abstract
Abstract AN IMPROVED SOLID STATE SWITCH OR MULTI-STATE MEMORY IS COMPOSED OF AN ELECTRODED BLOCK OF A SOLID SOLUTION OF LEAD ZIRCONATE TITANATE WITH LANTHANUM FERRITE, WITH THE SUBSTITUTION OF A DONOR ADDITIVE IN THE A OR B POSITION OF THE PEROVSKITE LATTICE. FOR EXAMPLE, ANTIMONY IS SUBSTITUTED FOR A PORTION OF THE ZIRCONIUM OR A PORTION OF THE TITANIUM, OR A TRIVALENT ATOM IS SUBSTITUTED FOR A PORTION OF THE LEAD. A TYPICAL COMPOSITION IS: (PB99SB.02(ZR.66TI.34).98O3)0.9(LAFEO3)0.1 THE IMPROVED COMPOSITION GIVES MORE FAVORABLE SWITCHING CHARACTERISTICS BOTH WITH RESPECT TO SPEED AND THE NUMBER OF TIMES SATISFACTORY SWITCHING IS OBTAINED AND LITTLE OR NO DEGRADUATION TAKES PLACE.
Inventors
- 👤 Bernard Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:59
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |