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US4938892A
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Sensor element for detecting temperature and moisture
Assignee: Aisin Corp
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Filing: 1988-06-27
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Granted: 1990-07-03
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Expires: 2008-06-27
Abstract
Abstract A sensor element for detecting temperature and moisture. The sensor element has a composition of (Ba1-kSrk) (Ti1-(1+m)Sn1Zrm)O3+xTiO2 wherein 0<k</=1, 0</=1</=1, 0</=m</=1, 1+m NOTEQUAL 0 and x is between 0.5 wt % and 7 wt %. The composition also provides for improved sensitivity to temperature because the Curie point of the sensor element is shifted down by the use of at least two elements selected from Sr, Sn and Zr. The presence of TiO2 amplifies sensitivity against moisture variation and inhibits grain growth.
Inventors
- 👤 Tatsuo Toyoda
- 👤 Nobuyasu Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:52
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/045; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4686; G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
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References Cited (Backward Citations)
JPS5658202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |