US3960778A
Expired / Lapsed
US
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Pyrochlore-based thermistors
Assignee: EIDP Inc
•
Filing: 1974-02-15
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Granted: 1976-06-01
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Expires: 1994-02-15
Abstract
Abstract Powder compositions comprising finely divided solid solutions of certain pyrochlore-related oxides and glass powder, and thermistors thereof, useful in the electronics art.
Inventors
- 👤 Robert Joseph Bouchard
- 👤 Donald Burl Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C17/0654
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
45 words
Powder compositions useful for making thermistors, said compositions comprising a. 50-98% of a crystalline powder which is a solid solution of pyrochlore-related oxides, one such oxide being highly conductive and another such oxide being semiconductive, and b. 2-50% of a glass powder as a binder.
Claim 2
Dependent Claim
45 words
Powder compositions useful for making thermistors, said compositions comprising a. 50-98% of a crystalline powder which is a solid solution of pyrochlore-related oxides, one such oxide being highly conductive and another such oxide being semiconductive, and b. 2-50% of a glass powder as a binder.
Claim 3
Dependent Claim
11 words
Compositions according to claim 1 dispersed in an inert liquid vehicle.
Claim 4
Dependent Claim
11 words
Compositions according to claim 1 comprising 60-85% (a) and 15-40% (b).
Claim 5
Dependent Claim
35 words
Compositions according to claim 1 wherein (a) comprises 10-50 mole percent of the highly conductive pyrochlore-related oxide and 50-90 mole percent of the semiconductive pyrochlore-related oxide, based on the total moles of pyrochlore-related oxide present.
Claim 6
Dependent Claim
19 words
Compositions according to claim 1 wherein the highly conductive pyrochlore-related oxide is Bi 2 Ru 2 O 7 .
Claim 7
Dependent Claim
19 words
Compositions according to claim 4 wherein the highly conductive pyrochlore-related oxide is Bi 2 Ru 2 O 7 .
Claim 8
Dependent Claim
30 words
Compositions according to claim 1 wherein the semiconductive pyrochlore-related oxide is Bi 2 BB'O 7 wherein B is Cr, Fe, In, or Ga and B' is Nb, Ta, or Sb.
Claim 9
Dependent Claim
30 words
Compositions according to claim 4 wherein the semiconductive pyrochlore-related oxide is Bi 2 BB'O 7 wherein B is Cr, Fe, In, or Ga and B' is Nb, Ta, or Sb.
Claim 10
Dependent Claim
30 words
Compositions according to claim 5 wherein the semiconductive pyrochlore-related oxide is Bi 2 BB'O 7 wherein B is Cr, Fe, In, or Ga and B' is Nb, Ta, or Sb.
Claim 11
Dependent Claim
18 words
Compositions according to claim 1 wherein the semiconductive pyrochlore-related oxide is Cd 2 Nb 2 O 7 .
Claim 12
Dependent Claim
18 words
Compositions according to claim 4 wherein the semiconductive pyrochlore-related oxide is Cd 2 Nb 2 O 7 .
Claim 13
Dependent Claim
18 words
Compositions according to claim 5 wherein the semiconductive pyrochlore-related oxide is Cd 2 Nb 2 O 7 .
Claim 14
Dependent Claim
26 words
Compositions according to claim 4 wherein (a) comprises 15-45 mole percent of the highly conductive pyrochlore-related oxide and 55-85 mole percent of the semiconductive pyrochlore-related oxide.
Claim 15
Dependent Claim
18 words
Compositions according to claim 5 wherein Bi 2 Ru 2 O 7 is 15-45 mole percent of (a).
Claim 16
Dependent Claim
18 words
Compositions according to claim 9 wherein Bi 2 Ru 2 O 7 is 15-45 mole percent of (a).
Claim 17
Dependent Claim
18 words
Compositions according to claim 12 wherein Bi 2 Ru 2 O 7 is 15-45 mole percent of (a).
Claim 18
Dependent Claim
11 words
Compositions according to claim 5 dispersed in an inert liquid vehicle.
Claim 19
Dependent Claim
11 words
Compositions according to claim 6 dispersed in an inert liquid vehicle.
Claim 20
Dependent Claim
11 words
Compositions according to claim 7 dispersed in an inert liquid vehicle.
Claim 21
Dependent Claim
11 words
Compositions according to claim 8 dispersed in an inert liquid vehicle.
Claim 22
Dependent Claim
11 words
Compositions according to claim 9 dispersed in an inert liquid vehicle.
Claim 23
Dependent Claim
11 words
Compositions according to claim 10 dispersed in an inert liquid vehicle.
Claim 24
Dependent Claim
11 words
Compositions according to claim 11 dispersed in an inert liquid vehicle.
Claim 25
Dependent Claim
11 words
Compositions according to claim 12 dispersed in an inert liquid vehicle.
Claim 26
Dependent Claim
7 words
Thermistors of the composition of claim 1.
Claim 27
Dependent Claim
7 words
Thermistors of the composition of claim 4.
Claim 28
Dependent Claim
7 words
Thermistors of the composition of claim 5.
Claim 29
Dependent Claim
7 words
Thermistors of the composition of claim 6.
Claim 30
Dependent Claim
7 words
Thermistors of the composition of claim 7.
Claim 31
Dependent Claim
7 words
Thermistors of the composition of claim 9.
Claim 32
Dependent Claim
7 words
Thermistors of the composition of claim 10.
Claim 33
Dependent Claim
7 words
Thermistors of the composition of claim 12.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |