US2683182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative electrode for alkaline storage batteries and method of manufacturing the same
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1953-04-27
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Granted: 1954-07-06
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Salauze Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:30
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/46; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/30; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF PRODUCING A NEGATIVE PLATE FOR AN ALKALINE ELECTRIC ACCUMULATOR COMPRISING THE STEPS OF PREPARING A MIXTURE OF INTIMATELY MIXING A FINELY-DIVIDED COPPER COMPOSED OF MINUTE CRYSTALS HAVING AN ACICULAR ARBORESCENT, DENDRICAL OR NEEDLE-LIKE SHAPE, WITH AN ACTIVE NEGATIVE MATERIAL CONSISTING OF FINELY-DIVIDED IRON PROVIDING SUBSTANCE, SAID ACTIVE NEGATIVE MATERIAL IN SAID MIXTURE BEING IN THE PROPORTIONS OF BETWEEN 20% AND 80% AND PREFERABLY IN THE THE PROPORTION OF 50% OF SAID MIXTURE, COATING THE MIXTURE OVER AND INTO THE INTERSTICES OF A MESH-LIKE SUPPORT AND COMPRESSING THE COATED ASSEMBLY AT SUSTANTIALLY ORDINARY ROOM TEMPERATURE AND AT A PRESSURE OF AT LEAST 1 METRIC TON PER SQUARE CENTIMETER, SAID IRON PROVIDING SUBSTANCE BEING OF VERY LOW APPARENT DENSITY AND VERY HIGH POROSITY AND BEING PRODUCED BY APPROXIMATE THERMAL REDUCTION OF AN APPROPIATE FORM OF FERRIC OXIDE THAT IS OF LOW APPARENT DENSITY AND HIGH POROSITY.
Claim 2
Independent Claim
147 words
A METHOD OF PRODUCING A NEGATIVE PLATE FOR AN ALKALINE ELECTRIC ACCUMULATOR COMPRISING THE STEPS OF PREPARING A MIXTURE OF INTIMATELY MIXING A FINELY-DIVIDED COPPER COMPOSED OF MINUTE CRYSTALS HAVING AN ACICULAR ARBORESCENT, DENDRICAL OR NEEDLE-LIKE SHAPE, WITH AN ACTIVE NEGATIVE MATERIAL CONSISTING OF FINELY-DIVIDED IRON PROVIDING SUBSTANCE, SAID ACTIVE NEGATIVE MATERIAL IN SAID MIXTURE BEING IN THE PROPORTIONS OF BETWEEN 20% AND 80% AND PREFERABLY IN THE THE PROPORTION OF 50% OF SAID MIXTURE, COATING THE MIXTURE OVER AND INTO THE INTERSTICES OF A MESH-LIKE SUPPORT AND COMPRESSING THE COATED ASSEMBLY AT SUSTANTIALLY ORDINARY ROOM TEMPERATURE AND AT A PRESSURE OF AT LEAST 1 METRIC TON PER SQUARE CENTIMETER, SAID IRON PROVIDING SUBSTANCE BEING OF VERY LOW APPARENT DENSITY AND VERY HIGH POROSITY AND BEING PRODUCED BY APPROXIMATE THERMAL REDUCTION OF AN APPROPIATE FORM OF FERRIC OXIDE THAT IS OF LOW APPARENT DENSITY AND HIGH POROSITY.
References Cited (Backward Citations)
US2267918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |