US3455739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric storage batteries
Assignee: Alkaline Batteries Ltd
•
Filing: 1964-05-21
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Granted: 1969-07-15
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Expires: 1984-05-21
Abstract
No abstract record available.
Inventors
- 👤 Braham Rowley Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN ELECTRIC STORAGE CELL OF ALKALINE TYPE HAVING A GASTIGHT CASING, PLATES OF OPPOSITE POLARITY IN SAID CASING, ABSORBENT GAS-PERMEABLE SEPARATOR MATERIAL SEPARATING SAID PLATES ARE OF POCKET TYPE COMPRISING A PLURALITY OF METALLIC POCKETS PACKED WITH ACTIVE MATERIAL, WHEREOF AT LEAST ONE PAIR OF ADJACENT POCKETS ARE SPACED APART TO PROVIDE BETWEEN THEM A GAS CAVITY BOUNDED PARTLY BY A PART OF THE SURFACE OF ONE OF THE PLATES, AND A UANTITY OF ELECTROLYTE SUFFICIENT TO SUBSTANTIALLY SATURATE AND BE ABSORBED BY THE SEPARATOR WHILE BEING DISTRIBUTED SO THAT AREAS OF THE SEPARATOR MATERIAL IN CONTACT WITH PLATES OF BOTH POLARITIES CONTAIN SUFFICIENT ABSORBED ELECTROLYTE TO PROVIDE EFFECTIVE CONDUCTION, BUT NEIGHBORING AREAS EXPOSED ON AT LEAST ONE SIDE TO A CAVITY ARE SUFFICIENTLY DRY TO PERMIT THE PASSAGE OF GAS THROUGH THE SEPARATOR.
Claim 2
Dependent Claim
134 words
AN ELECTRIC STORAGE CELL OF ALKALINE TYPE HAVING A GASTIGHT CASING, PLATES OF OPPOSITE POLARITY IN SAID CASING, ABSORBENT GAS-PERMEABLE SEPARATOR MATERIAL SEPARATING SAID PLATES ARE OF POCKET TYPE COMPRISING A PLURALITY OF METALLIC POCKETS PACKED WITH ACTIVE MATERIAL, WHEREOF AT LEAST ONE PAIR OF ADJACENT POCKETS ARE SPACED APART TO PROVIDE BETWEEN THEM A GAS CAVITY BOUNDED PARTLY BY A PART OF THE SURFACE OF ONE OF THE PLATES, AND A UANTITY OF ELECTROLYTE SUFFICIENT TO SUBSTANTIALLY SATURATE AND BE ABSORBED BY THE SEPARATOR WHILE BEING DISTRIBUTED SO THAT AREAS OF THE SEPARATOR MATERIAL IN CONTACT WITH PLATES OF BOTH POLARITIES CONTAIN SUFFICIENT ABSORBED ELECTROLYTE TO PROVIDE EFFECTIVE CONDUCTION, BUT NEIGHBORING AREAS EXPOSED ON AT LEAST ONE SIDE TO A CAVITY ARE SUFFICIENTLY DRY TO PERMIT THE PASSAGE OF GAS THROUGH THE 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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |