Patent US2880257A successfully refreshed from Google Patents.
US2880257A
Expired / Lapsed
US
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Alkaline storage battery
Assignee: Exide Technologies LLC
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Filing: 1956-03-27
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Granted: 1959-03-31
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Expires: 1976-03-27
Abstract
No abstract record available.
Inventors
- 👤 Harold P Murphy
- 👤 Abraham L Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/28; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF PRODUCING BATTERY ELECTRODES COMPRISING THE STEPS OF IMPREGNATING A POROUS MATRIX SELECTED FROM A GROUP CONSISTING OF SINTERED NICKEL AND GRAPHITE WITH A SOLUTION OF A METAL NITRATE, REACTING SAID METAL NITRATE WITH A SOLUTION OF REACTANT SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FORMIC ACID TO FORM A METAL FORMATE, THERMALLY DECOMPOSING SAID METAL FORMATE IN AN OXIDIZING ATMOSPHERE TO FORM ELECTROCHEMICALLY ACTIVE MATERIAL WITHIN SAID MATRIX.
Claim 2
Independent Claim
72 words
A METHOD OF PRODUCING BATTERY ELECTRODES COMPRISING THE STEPS OF IMPREGNATING A POROUS MATRIX SELECTED FROM A GROUP CONSISTING OF SINTERED NICKEL AND GRAPHITE WITH A SOLUTION OF A METAL NITRATE, REACTING SAID METAL NITRATE WITH A SOLUTION OF REACTANT SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FORMIC ACID TO FORM A METAL FORMATE, THERMALLY DECOMPOSING SAID METAL FORMATE IN AN OXIDIZING ATMOSPHERE TO FORM ELECTROCHEMICALLY ACTIVE MATERIAL WITHIN SAID MATRIX.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |