US2640864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of porous zinc electrodes
Assignee: United States Department of the Army
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Filing: 1951-06-27
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Granted: 1953-06-02
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Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Fischbach Adolph
- 👤 Hochberg Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:22
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF MAKING A LIGHTWEIGHT POROUS ZINC NEGATIVE ELECTRODED FOR PRIMARY BATTERIES COMPRICES MAKING A PASTY MIXTURE OF ZINC OXIDE AND WATER, PASTING SAID MIXTURE INTO A SUPPORTING METAL SCREEN, DRYING SAID PLATE ELECTRODE AND THEN SUBMITTING IT FOR A VERY SHORT TIME TO TEMPERATURES ABOVE 300* C., FORMING SAID ELECTRODE CATHODICALLY IN A FORMING SOLUTION TO SPONGE ZINC AND FINALLY WASHING AND DRYING SAID SPONGE ZINC ELECTRODE.
Claim 2
Independent Claim
69 words
A METHOD OF MAKING A LIGHTWEIGHT POROUS ZINC NEGATIVE ELECTRODED FOR PRIMARY BATTERIES COMPRICES MAKING A PASTY MIXTURE OF ZINC OXIDE AND WATER, PASTING SAID MIXTURE INTO A SUPPORTING METAL SCREEN, DRYING SAID PLATE ELECTRODE AND THEN SUBMITTING IT FOR A VERY SHORT TIME TO TEMPERATURES ABOVE 300* C., FORMING SAID ELECTRODE CATHODICALLY IN A FORMING SOLUTION TO SPONGE ZINC AND FINALLY WASHING AND DRYING SAID SPONGE ZINC ELECTRODE.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |