Patent US3932312A successfully refreshed from Google Patents.
US3932312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant temperature coefficient thick film thermistor
Assignee: Beckman Coulter Inc
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Filing: 1974-04-01
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Granted: 1976-01-13
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Expires: 1994-04-01
Abstract
Abstract A thermistor material which, when screened and fired upon ceramic substrates by thick film techniques, exhibits a substantially constant temperature coefficient of electrical resistance. The thermistor composition or ink, before screening, comprises from 30 to 80% by weight of an oxide of vanadium VOX, where X varies from 1.5 to 2.5, mixed with 70 to 20% by weight of a glass frit.
Inventors
- 👤 Casimir W. Kazmierowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/047
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
A thermistor material composition comprising 30-80% by weight VO X where X varies from 1.5 to 1.9, and 70-20% by weight of glass.
Claim 2
Dependent Claim
23 words
A thermistor material composition comprising 30-80% by weight VO X where X varies from 1.5 to 1.9, and 70-20% by weight of glass.
Claim 3
Dependent Claim
13 words
The composition of claim 1 where the glass is of the alumino-borosilicate class.
Claim 4
Dependent Claim
12 words
The composition of claim 1 where X varies from 1.6 to 1.9.
Claim 5
Dependent Claim
38 words
A thermistor material having a substantially constant temperature coefficient of resistance over the range of 10°C to 90°C comprising 30-80% by weight VO X , where X varies from 1.5 to 1.9 and 70-20% by weight of glass.
Claim 6
Dependent Claim
38 words
A thermistor material having a substantially constant temperature coefficient of resistance over the range of 10°C to 90°C comprising 30-80% by weight VO X , where X varies from 1.5 to 1.9 and 70-20% by weight of glass.
Claim 7
Dependent Claim
13 words
The composition of claim 4 wherein the glass is of the alumino-borosilicate class.
Claim 8
Dependent Claim
12 words
The composition of claim 4 where X varies from 1.6 to 1.9.
Claim 9
Independent Claim
59 words
A method of making a thermistor having a substantially constant temperature coefficient of resistance over the range of 10°C to 90°C comprising preparing a thermistor material composition comprising 30-80% by weight VO X where X varies from 1.5 to 1.9 and 70-20% by weight of glass, applying and firing said composition to a ceramic substrate to form a thermistor.
Claim 10
Independent Claim
59 words
A method of making a thermistor having a substantially constant temperature coefficient of resistance over the range of 10°C to 90°C comprising preparing a thermistor material composition comprising 30-80% by weight VO X where X varies from 1.5 to 1.9 and 70-20% by weight of glass, applying and firing said composition to a ceramic substrate to form a thermistor.
Claim 11
Dependent Claim
14 words
The method of claim 7 where the applying said composition is accomplished by screening.
Claim 12
Dependent Claim
13 words
The method of claim 7 where the glass is of the alumino-borosilicate class.
Claim 13
Dependent Claim
12 words
The method of claim 7 where X varies from 1.6 to 1.9.
References Cited (Backward Citations)
GB1328954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |