US3657018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline galvanic cell having a cover made of an elastically resilient laminate
Assignee: Leclanche SA
•
Filing: 1970-04-21
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Granted: 1972-04-18
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Expires: 1990-04-21
Abstract
Abstract An alkaline galvanic cell having a positive electrode containing a heavy metal oxide in contact with a metallic housing and a negative electrode containing an amalgamated zinc in contact with a cover, said cover being formed from an elastically resilient laminate having an exterior side consisting of a layer of nickel or a layer of a rust-proof nickel alloy and having a thickness of 0.05 to 0.5 mm. and an interior side consisting of a layer of copper, zinc, tin, lead or their alloys and having a thickness of 0.05 to 0.5 mm. at least one layer of said laminate consisting of a spring alloy.
Inventors
- 👤 Paul Ruetschi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/147; H01M50/166; H01M50/171; H01M50/167; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
An alkaline galvanic cell according to claim 1, which is characterized in that the exterior layer of the cover has a hardness of more than 250 Vickers degrees of hardness and is made elastically resilient.
Claim 2
Dependent Claim
35 words
An alkaline galvanic cell according to claim 1, which is characterized in that the exterior layer of the cover has a greater hardness than the metallic housing that is in contact with the positive electrode.
Claim 3
Dependent Claim
52 words
An alkaline galvanic cell according to claim 1, which is characterized in that thE interior layer of the cover consists of a spring bronze containing 5 - 15 percent tin and 85 - 95 percent copper and in that said layer has a hardness of more than 100 Vickers degrees of hardness.
Claim 4
Dependent Claim
20 words
An alkaline galvanic cell according to claim 4 wherein said spring bronze contains 8 percent tin and 92 percent copper.
Claim 5
Dependent Claim
51 words
An alkaline galvanic cell according to claim 1, which is characterized in that the interior layer of the cover consists of spring brass containing 30 - 40 percent zinc and 60 - 70 percent copper and in that said layer has a hardness of more than 100 Vickers degrees of hardness.
Claim 6
Dependent Claim
20 words
An alkaline galvanic cell according to claim 6 wherein said spring brass contains 37 percent zinc and 63 percent copper.
References Cited (Backward Citations)
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US3457117A
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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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |