US2994728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline storage batteries
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1958-02-17
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Granted: 1961-08-01
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Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Herold Rodolphe Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/4295; H01M50/44; H01M50/471; H01M50/48; H01M50/486; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN AN ALKALINE STORAGE CELL INCLUDING ALKALINE ELECTROLYTE AND FINELY POROUS POSITIVE AND NEGATIVE ELECTRODE PLATES COMPRISING A SUPPORET FOR AGGLOMERATED METAL PARATIVE ACTIVE MATERIALS, A THIN SEPARATOR POSITIONED BETWEEEN THE ELECTRODE PLATES, SAID SEPARATOR BEING COMPOSED OF A CONTINUOUS MEMBRANIC MIDDLE LAYER OF REGENERATED CELLULOSE HAVING A THICKNESS OF APPROXIMATELY 0.01 TO 0.03 MM., AN OUTER LAYER ON ONE SIDE OF THE MIDDLE LAYER COMPOSED OF LONG NON-WOVEN CELLULOSIC FIBERS AGGLOMERATED BY A CELLULOSE BINDER AND HAVING A THICKNESS OF APPROXIMATELY 0.15 TO 0.20 MM., A SECOND OUTER LAYER ON THE OTHER SIDE OF THE MIDDLE LAYER COMPOSED BY LONG UNWOVEN FIBERS O-F SYNTHETIC MATERIAL UNALTERABLE BY THE ELECTROLYTE AND HAVING A THICKNESS OF ABOUT 0.1 MM., EACH OF SAID LAYERS HAVING A SURFACE AREA AT LEAST AS LARGE AS THAT OF THE ELECTRODE PLATES AND THE OUTER FACES OF SAID SEPARATOR
Claim 2
Dependent Claim
143 words
IN AN ALKALINE STORAGE CELL INCLUDING ALKALINE ELECTROLYTE AND FINELY POROUS POSITIVE AND NEGATIVE ELECTRODE PLATES COMPRISING A SUPPORET FOR AGGLOMERATED METAL PARATIVE ACTIVE MATERIALS, A THIN SEPARATOR POSITIONED BETWEEEN THE ELECTRODE PLATES, SAID SEPARATOR BEING COMPOSED OF A CONTINUOUS MEMBRANIC MIDDLE LAYER OF REGENERATED CELLULOSE HAVING A THICKNESS OF APPROXIMATELY 0.01 TO 0.03 MM., AN OUTER LAYER ON ONE SIDE OF THE MIDDLE LAYER COMPOSED OF LONG NON-WOVEN CELLULOSIC FIBERS AGGLOMERATED BY A CELLULOSE BINDER AND HAVING A THICKNESS OF APPROXIMATELY 0.15 TO 0.20 MM., A SECOND OUTER LAYER ON THE OTHER SIDE OF THE MIDDLE LAYER COMPOSED BY LONG UNWOVEN FIBERS O-F SYNTHETIC MATERIAL UNALTERABLE BY THE ELECTROLYTE AND HAVING A THICKNESS OF ABOUT 0.1 MM., EACH OF SAID LAYERS HAVING A SURFACE AREA AT LEAST AS LARGE AS THAT OF THE ELECTRODE PLATES AND THE OUTER FACES OF SAID SEPARATOR
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |