US4806900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermistor and method for producing the same
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1987-09-25
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Granted: 1989-02-21
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Expires: 2007-09-25
Abstract
Abstract A thermistor comprising a substrate and a heat sensitive element consisting of a semiconductive thin film diamond, which can measure high temperatures up to 800 DEG C. or higher.
Inventors
- 👤 Naoji Fujimori
- 👤 Takahiro Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C7/00; H01C7/04; H01C7/041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
22 words
A thermistor comprising a substrate and a heat sensitive element consisting of a thin film comprised of diamond deposited on said substrate.
Claim 2
Dependent Claim
22 words
A thermistor comprising a substrate and a heat sensitive element consisting of a thin film comprised of diamond deposited on said substrate.
Claim 3
Dependent Claim
28 words
The thermistor according to claim 1, wherein the diamond thin film is formed by a vapor phase synthetic method and has a thickness of 0.05 to 100 μm.
Claim 4
Dependent Claim
20 words
The thermistor according to claim 1, wherein the diamond thin film is a semiconductive diamond thin film containing a dopant.
Claim 5
Dependent Claim
32 words
The thermistor according to claim 3, wherein the dopant is at least one element selected from the group consisting of boron, aluminum, phosphorus, arsenic, antimony, silicon, lithium, sulfur, selenium, chlorine and nitrogen.
Claim 6
Dependent Claim
14 words
The thermistor according to claim 1, wherein the substrate is a single crystal diamond.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |