US2923757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cell
Assignee: Duracell Inc USA
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Filing: 1957-03-27
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Granted: 1960-02-02
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Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Edward M Klopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:34
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/449; H01M50/454; H01M50/451; H01M50/457; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PRIMARY CELL COMPRISING A ZINC ANODE CONTAINER, A CARBON ELECTRODE DISPOSED WITHIN THE ZINC ANODE AND SURROUNDED BY A DEPOLARIZING MIX, AND A PERMEABLE SEPARATOR INTERPOSED BETWEEN THE MIX AND THE INTERIOR SURFACE OF THE ZINC ANODE, SAID SEPARATOR COMPRISING A SHEET OF POROUS FLEXIBLE FIBROUS MATERIAL HAVING A STICKY COATING CONSISTING ESSENTIALLY OF POLYBUTENE THEREON AND A LAYER CONSISTING ESSENTIALLY OF A GELLING MATERIAL ADHERING TO SAID STICKY COATING AND DISPOSED IN CONTACT WITH THE INNER SURFACE OF THE ZINC ANODE CONTAINER.
Claim 2
Dependent Claim
84 words
A PRIMARY CELL COMPRISING A ZINC ANODE CONTAINER, A CARBON ELECTRODE DISPOSED WITHIN THE ZINC ANODE AND SURROUNDED BY A DEPOLARIZING MIX, AND A PERMEABLE SEPARATOR INTERPOSED BETWEEN THE MIX AND THE INTERIOR SURFACE OF THE ZINC ANODE, SAID SEPARATOR COMPRISING A SHEET OF POROUS FLEXIBLE FIBROUS MATERIAL HAVING A STICKY COATING CONSISTING ESSENTIALLY OF POLYBUTENE THEREON AND A LAYER CONSISTING ESSENTIALLY OF A GELLING MATERIAL ADHERING TO SAID STICKY COATING AND DISPOSED IN CONTACT WITH THE INNER SURFACE OF THE ZINC ANODE CONTAINER.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |