US2620367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-acid accumulator
Assignee: Chloride Electrical Storage Co Ltd
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Filing: 1950-03-17
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Granted: 1952-12-02
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Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
- 👤 Brown Harold George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:58
CPC Classifications
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: 1
Claim 1
Independent Claim
57 words
A PASTED PLATE LEAD ACID ACCUMULATOR HAVING REDUCED CHARGE LOSS IN OPEN CIRCUIT AND HAVING REDUCED HYDROGEN EVOLUTION, THE PLATES THEREOF BEING FORMED OF AN ALLOY CONSISTING OF LEAD CONTAINING TIN IN PROPORTION OF ABOUT 4.75 TO 5.75% AND SELENIUM IN PROPORTION OF ABOUT .05 TO 0.1%, THE BALANCE BEING ANTIMONY AND TELLURIUM-FREE LEAD CONTAINING USUAL IMPURITIES.
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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |