US4757424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric double layer capacitor
Assignee: Elna Co Ltd
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Filing: 1987-09-21
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Granted: 1988-07-12
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Expires: 2007-09-21
Abstract
Abstract An electric double layer capacitor comprising a casing and polarizable electrodes and an electrolyte solution accommodated in the casing and utilizing an electric double layer formed by the interface of the electrolyte solution and the polarizable electrodes, characterized in that at least the portion of the casing which is in contact with the electrolyte solution at the anode side is made of an alloy steel consisting essentially of from 50 to 75.3% by weight of Fe, from 10.0 to 35.0% by weight of Cr, from 0 to 25.0% by weight of Ni, from 0.1 to 5.0% by weight of Mo and from 0.1 to 2.0% by weight of N.
Inventors
- 👤 Takeshi Morimoto
- 👤 Kazuya Hiratsuka
- 👤 Yasuhiro Sanada
- 👤 Hiroshi Aruga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:12
CPC Classifications
H; H01; H01G; H01G11/00; H01G11/66; H01G11/68; H01G11/78; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
An electric double layer capacitor comprising a casing and polarizable electrodes and an electrolyte solution accommodated in the casing and utilizing an electric double layer formed by the interface of the electrolyte solution and the polarizable electrodes, characterized in that at least the portion of the casing which is in contact with the electrolyte solution at the anode side is made of an alloy steel consisting essentially of from 50 to 75.3% by weight of Fe, from 10.0 to 35.0% by weight of Cr, from 0 to 25.0% by weight of Ni, from 0.1 to 5.0% by weight of Mo and from 0.1 to 2.0% by weight of N.
Claim 2
Dependent Claim
109 words
An electric double layer capacitor comprising a casing and polarizable electrodes and an electrolyte solution accommodated in the casing and utilizing an electric double layer formed by the interface of the electrolyte solution and the polarizable electrodes, characterized in that at least the portion of the casing which is in contact with the electrolyte solution at the anode side is made of an alloy steel consisting essentially of from 50 to 75.3% by weight of Fe, from 10.0 to 35.0% by weight of Cr, from 0 to 25.0% by weight of Ni, from 0.1 to 5.0% by weight of Mo and from 0.1 to 2.0% by weight of N.
Claim 3
Dependent Claim
28 words
The capacitor according to claim 1, which further contains a current collector for the anode, which is made of the same alloy steel as defined in claim 1.
Claim 4
Dependent Claim
41 words
The capacitor according to claim 1, wherein the casing consists of a metal can for the cathode and a cap for the anode, joined together with an insulating packing inerposed between them, and the cap is made of said alloy steel.
References Cited (Backward Citations)
US2733389A
Cited
US1709427A
Cited
US3105178A
Cited
US4313084A
Cited
US4260668A
Cited
US4626964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |