Patent US4125690A successfully refreshed from Google Patents.
US4125690A
Expired / Lapsed
US
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Battery electrode structure
Assignee: Chloride Group Ltd
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Filing: 1977-03-03
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Granted: 1978-11-14
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Expires: 1997-03-03
Abstract
Abstract There is disclosed a battery electrode structure made of a lead-calcium-tin alloy comprising 0.075 to 0.13% by weight calcium, 0.005 to 0.99% by weight tin and 0.0001% to 0.1% by weight aluminium, the balance being substantially lead.
Inventors
- 👤 Norman E. Bagshaw
- 👤 John McWhinnie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
C; C22; C22C; C22C11/00; C22C11/02; C22C11/06; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; H01M4/685; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
60 words
A battery electrode structure made of a lead-calcium-tin alloy consisting essentially of 0.081 to 0.099% by weight calcium, 0.4 to 0.7% by weight tin and 0.0001% to 0.1% by weight aluminum, the balance being substantially lead, said alloy having a Brinell hardness of at least 12, 2 days after casting to enable the alloy to be automatically trimmed and handled.
Claim 2
Dependent Claim
60 words
A battery electrode structure made of a lead-calcium-tin alloy consisting essentially of 0.081 to 0.099% by weight calcium, 0.4 to 0.7% by weight tin and 0.0001% to 0.1% by weight aluminum, the balance being substantially lead, said alloy having a Brinell hardness of at least 12, 2 days after casting to enable the alloy to be automatically trimmed and handled.
Claim 3
Dependent Claim
12 words
A battery electrode structure of claim 1 containing 0.003 to 0.006% aluminium.
Claim 4
Dependent Claim
40 words
A battery electrode structure of claim 1 comprising 0.085 to 0.09% by weight calcium and 0.4 to 0.7% by weight tin and aluminum in an amount of 0.0001% up to less than 0.01% by weight, the balance being substantially lead.
Claim 5
Dependent Claim
12 words
A battery electrode structure of claim 3 containing 0.003 to 0.009% aluminium.
Claim 6
Dependent Claim
42 words
A battery electrode structure of claim 1 comprising 0.088% to 0.099% by weight calcium, 0.401 to 0.499% by weight tin, the ratio of tin to calcium being less than 5:1 and 0.001 to less than 0.01% aluminium, the balance being substantially lead.
References Cited (Backward Citations)
US2159124A
Cited
US2794707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |