US4344062A
Expired / Lapsed
US
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Humidity sensor element
Assignee: Taiheiyo Cement Corp
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Filing: 1980-06-03
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Granted: 1982-08-10
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Expires: 2000-06-03
Abstract
Abstract A humidity sensor element comprising a metal oxide semiconductor sintered member having a composition composed of TiO 2 and V 2 O 5 , the member being formed with a pair of electrodes. When the element is used at a temperature of less than 400° C., it is possible to detect the humidity as a variation of electric resistance.
Inventors
- 👤 Giichi Sudoh
- 👤 Keiichi Minegishi
- 👤 Tokuji Akiba
- 👤 Tadao Kato
- 👤 Norio Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/047
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
A humidity sensor element comprising a metal oxide semiconductor sintered member composed of a composition of TiO 2 as a principal material and containing 0.1 to 10 mole % of V 2 O 5 , said member being provided with electrodes.
Claim 2
Dependent Claim
41 words
A humidity sensor element comprising a metal oxide semiconductor sintered member composed of a composition of TiO 2 as a principal material and containing 0.1 to 10 mole % of V 2 O 5 , said member being provided with electrodes.
Claim 3
Dependent Claim
51 words
A humidity sensor element according to claim 1, wherein the metal oxide semiconductor sintered member is in the form of a disk, and silver paste is baked onto the opposite surfaces of the sintered member to form a pair of electrodes, each of said electrodes having a lead wire soldered thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |