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Patent US4119767A successfully refreshed from Google Patents.
US4119767A
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Secondary battery
Assignee: BASF SE
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Filing: 1977-04-01
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Granted: 1978-10-10
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Expires: 1997-04-01
Abstract
Abstract In a secondary battery employing an aqueous lead salt solution as the electrolyte, salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony are additionally present in concentrations of from 0.1 to 100 mmole/l.
Inventors
- 👤 Fritz Beck
- 👤 Rolf Wurmb
- 👤 Klaus Boehlke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A secondary battery with aqueous solutions of lead salts as electrolytes and inert electrode base plates for the active materials, wherein the electrolyte additionally contains from 0.1 to 100 mmoles/l of salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony.
Claim 2
Dependent Claim
41 words
A secondary battery with aqueous solutions of lead salts as electrolytes and inert electrode base plates for the active materials, wherein the electrolyte additionally contains from 0.1 to 100 mmoles/l of salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony.
Claim 3
Dependent Claim
32 words
A secondary battery as set forth in claim 1, wherein the anions of the salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony correspond to the anion of the lead salt.
Claim 4
Dependent Claim
63 words
A secondary battery as set forth in claim 1, wherein the electrolyte additionally contains dissolved redox systems which have a standard potential of from -0.1 to +1.4 V relative to a standard hydrogen reference electrode, which redox systems do not form insoluble compounds with the electrolyte and are not oxidized or reduced irreversibly by the active materials within their range of operating potentials.
References Cited (Backward Citations)
US3540933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |