US3872358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid electrolytic capacitor and solid electrolyte therefor
Assignee: Panasonic Holdings Corp
•
Filing: 1973-06-11
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Granted: 1975-03-18
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Expires: 1993-06-11
Abstract
Abstract A solid electrolyte comprising a 7,7,8,8tetracyanoquinodimethane-base charge transfer complex which contains a quaternary nitrogen-containing heterocyclic compound, the hydrogen at N-position of the heterocyclic compound being substituted by an alkyl group, an alkylene group or a cycloalkyl group. The electrolyte may further comprise a minor amount of a polymer for improving a film-forming property of the charge transfer complex and adherence of the complex to electrodes solid electrolytic capacitors using the above-mentioned complex are also disclosed.
Inventors
- 👤 Mutsuaki Murakami
- 👤 Susumu Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:40
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G9/028
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
AN ELECTROLYTIC CAPACITOR HAVING IMPROVED THERMAL STABILITY COMPRISING A PAIR OF ELECTRODES, AT LEAST ONE OF SAID ELECTRODES BEING COMPOSED OF A FILM-FORMING METAL HAVING A DIELECTRIC FILM THEREON, AND A SOLID ELECTROLYTE COMPRISING A CHARGE TRANSFER COMPLEX COMPOSED OF 7,7,8,8TETRACYANOQUINODIMETHANE AND A NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, SAID COMPLX HAVING A N-POSITION OF THE HETEROCYCLIC COMPOUND A SUBSTITUENT GROUP SELECTED FROM AN
Claim 2
Dependent Claim
61 words
AN ELECTROLYTIC CAPACITOR HAVING IMPROVED THERMAL STABILITY COMPRISING A PAIR OF ELECTRODES, AT LEAST ONE OF SAID ELECTRODES BEING COMPOSED OF A FILM-FORMING METAL HAVING A DIELECTRIC FILM THEREON, AND A SOLID ELECTROLYTE COMPRISING A CHARGE TRANSFER COMPLEX COMPOSED OF 7,7,8,8TETRACYANOQUINODIMETHANE AND A NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, SAID COMPLX HAVING A N-POSITION OF THE HETEROCYCLIC COMPOUND A SUBSTITUENT GROUP SELECTED FROM AN
Claim 3
Dependent Claim
29 words
A solid electrolytic capacitor as claimed in claim 1, wherein said complex is a normal one which contains 1 mole of neutral 7, 7,8,8-tetracyanoquinodimethane per mole of said complex.
Claim 4
Dependent Claim
35 words
A solid electrolytic capacitor as claimed in claim 1, wherein said complex salt is an abnormal one which contains neutral 7,7, 8,8-tetracyanoquinodimethane in a molar number deviated from 1 per mole of said complex salt.
Claim 5
Dependent Claim
58 words
A solid electrolytic capacitor as claimed in claim 3, wherein said abnormal complex salt is selected from the group consisting of (N-methyl quinolinium) (TCNQ) (TCNQ)0.6, (N-ethyl quinolinium) (TCNQ) (TCNQ)0.8, (N-n-propyl quinolinium) (TCNQ) (TCNQ)0.9, (N-iso-propyl quinolinium) (TCNQ) (TCNQ)1.2, (N-tert-butyl quinolinium) (TCNQ) (TCNQ)2.1, (N-methyl pyridinium) (TCNQ) (TCNQ)1.1, (N-ethyl pyridinium) (TCNQ) (TCNQ)0.9, (N-n-propyl pyridinium) (TCNQ) (TCNQ)1.6, and (N-tert-butyl pyridinium) (TCNQ) (TCNQ)1.2.
Claim 6
Dependent Claim
24 words
A solid electrolytic capacitor as claimed in claim 1, wherein said nitrogen-containing heterocyclic compound is selected from the group consisting of quinoline and pyridine.
Claim 7
Dependent Claim
35 words
A solid electrolytic capacitor as claimed in claim 1, further comprising a polymer which is mixed with said charge transfer complex in an amount of 1 to 20 percent by weight of said transfer complex.
Claim 8
Dependent Claim
47 words
A solid electrolytic capacitor as claimed in claim 6, wherein said polymer is selected from the group consisting of 6-nylon, polyvinylpyrrolidone, cellulose derivatives, polyvinylacetate, polyvinylchloride, polyurethane, polymethylmethacrylate, polybutadiene, polychloroprene, polyacrilonitrile, polymethacrylonitrile, polyvinylpyridien, and copolymers of acrilonitrile, methacrylonitrile, and vinylpyridine with each other or with other polymerizable moNomers.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |