US3913057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen ion transport type thermistors
Assignee: Niterra Co Ltd
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Filing: 1974-06-14
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Granted: 1975-10-14
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Expires: 1994-06-14
Abstract
Abstract An oxygen ion transport type thermistor comprising an oxygen ion type solid solution consisting of 50-95 mol percent of an oxide of tetravalent metals and 5-50 mol percent of oxide(s) of divalent and/or trivalent metals and two metal lead wires embedded in said solid solution, in which said two metal wires are embedded and held oppositely in substantially the center line in the thickness direction of said solid solution, parallel and adequately space and that the porosity of said oxygen ion type solid solution is 7-55 percent.
Inventors
- 👤 Yoshiro Ushida
- 👤 Shinji Nishio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:03
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
AN OXYGEN ION TRANSPORT TYPE THERMISTOR COMPRISING AN OXYGEN ION SOLID SOLUTION CONSISTING OF 50-95 MOL PERCENT OF AT LEAST ONE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ZRO2, CEO2, HFO2 AND THO2, AND 5-50 MOL PERCENT OF AT LEAST ONE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO, SRO, LA2O3, Y2O3, YB2O3, SC2O3, GD2O3 AND ND2O3, AND TWO METAL LEAD WIRES ARE EMBEDDED IN SAID SOLUTION AND HELD IN AN ADEQUATELY SPACED PARALLEL RELATIONSHIP TO EACH OTHER AND LYING SUBSTANTIALLY IN THE CENTER LINE IN THE THICKNESS DIRECTION OF SAID SOLUTION AND THAT THE POROSITY OF SAID OXYGEN ION TRANSPORT TYPE SOLID SOLUTION IS 7-55 PERCENT.
Claim 2
Dependent Claim
110 words
AN OXYGEN ION TRANSPORT TYPE THERMISTOR COMPRISING AN OXYGEN ION SOLID SOLUTION CONSISTING OF 50-95 MOL PERCENT OF AT LEAST ONE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ZRO2, CEO2, HFO2 AND THO2, AND 5-50 MOL PERCENT OF AT LEAST ONE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO, MGO, SRO, LA2O3, Y2O3, YB2O3, SC2O3, GD2O3 AND ND2O3, AND TWO METAL LEAD WIRES ARE EMBEDDED IN SAID SOLUTION AND HELD IN AN ADEQUATELY SPACED PARALLEL RELATIONSHIP TO EACH OTHER AND LYING SUBSTANTIALLY IN THE CENTER LINE IN THE THICKNESS DIRECTION OF SAID SOLUTION AND THAT THE POROSITY OF SAID OXYGEN ION TRANSPORT TYPE SOLID SOLUTION IS 7-55 PERCENT.
Claim 3
Dependent Claim
13 words
The thermistor as claimed in claim 1, wherein said porosity is 15-35 percent.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |