US4156887A
Expired / Lapsed
US
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Heat-sensitive capacitor
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1977-04-12
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Granted: 1979-05-29
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Expires: 1997-04-12
Abstract
Abstract The invention relates to a heat-sensitive capacitor comprising a layer of dielectric material inserted between two metal electrodes.
Inventors
- 👤 Jean Tanguy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/34; G01K7/343; H; H01; H01G; H01G7/00; H01G7/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
A heat sensitive capacitor comprising two metal electrodes and a layer of dielectric material inserted between said electrodes, said dielectric material comprising molecules of an organic compound comprising at least one aliphatic chain of at least 6 carbon atoms and at least one heterocyclic group containing a nitrogen atom, and molecules of an ionic complex of the organic compound, said organic compound having a reversible phase transition at a given temperature and being selected from the group consisting of (a) 4,7-diheptadecyl-5-octadecyl-oxy-1,10-phenanthroline having the following formula: ##STR8## (b) 4-heptadecyl-6-octadecyl-oxy-8-amino quinoleine having the formula: ##STR9## and (c) 4-heptadecyl-1-pyridine having the formula: ##STR10##
Claim 2
Dependent Claim
100 words
A heat sensitive capacitor comprising two metal electrodes and a layer of dielectric material inserted between said electrodes, said dielectric material comprising molecules of an organic compound comprising at least one aliphatic chain of at least 6 carbon atoms and at least one heterocyclic group containing a nitrogen atom, and molecules of an ionic complex of the organic compound, said organic compound having a reversible phase transition at a given temperature and being selected from the group consisting of (a) 4,7-diheptadecyl-5-octadecyl-oxy-1,10-phenanthroline having the following formula: ##STR8## (b) 4-heptadecyl-6-octadecyl-oxy-8-amino quinoleine having the formula: ##STR9## and (c) 4-heptadecyl-1-pyridine having the formula: ##STR10##
Claim 3
Dependent Claim
17 words
A capacitor according to claim 1, wherein the organic compound is 4,7-diheptadecyl-5-octadecyl-oxy-1,10-phenanthroline having the following formula: ##STR11##
Claim 4
Dependent Claim
38 words
A capacitor according to claim 1, wherein the ionic complex of the organic compound is the organic compound and an ionic compound fixed thereto, said ionic compound being chosen from the group comprising hydrochloric acid and aluminum hydroxide.
Claim 5
Dependent Claim
25 words
A capacitor according to claim 1, wherein the electrodes are of aluminium or of a metal suitable for forming a thin layer of insulating oxide.
Claim 6
Dependent Claim
75 words
A heat sensitive capacitor comprising two metal electrodes and a layer of dielectric material inserted between said electrodes, said dielectric material comprising molecules of an organic quaternary ammonium salt comprising at least one aliphatic chain of at least 6 carbon atoms and at least one heterocyclic group containing a nitrogen atom, said salt having a reversible phase transition at a given temperature and being selected from the group consisting of pyridinium halides and bipyridinium halides.
Claim 7
Dependent Claim
75 words
A heat sensitive capacitor comprising two metal electrodes and a layer of dielectric material inserted between said electrodes, said dielectric material comprising molecules of an organic quaternary ammonium salt comprising at least one aliphatic chain of at least 6 carbon atoms and at least one heterocyclic group containing a nitrogen atom, said salt having a reversible phase transition at a given temperature and being selected from the group consisting of pyridinium halides and bipyridinium halides.
Claim 8
Dependent Claim
30 words
A capacitor according to claim 5, wherein the dielectric material is an N-alkyl pyridinium iodide having the following formula: ##STR12## in which n is an integer between 6 and 22.
Claim 9
Dependent Claim
30 words
A capacitor according to claim 5, wherein the dielectric material is an N-alkyl 2,2'-bipyridinium iodide having the following formula: ##STR13## in which n is an integer between 6 and 22.
Claim 10
Dependent Claim
19 words
A capacitor according to claim 5, wherein the dielectric material is an N-alkyl,-pyridinium chloride having the following formula: ##STR14##
Claim 11
Dependent Claim
25 words
A capacitor according to claim 5, wherein the electrodes are of aluminum or of a metal suitable for forming a thin layer of insulating oxide.
Claim 12
Dependent Claim
22 words
The use of the heat sensitive capacitor of claim 1 for constructing devices for measuring the temperature near the aforementioned transition temperature.
Claim 13
Dependent Claim
14 words
The use of the heat-sensitive capacitor of claim 1 for constructing infrared radiation detectors.
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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |