US2880258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making negative electrodes for electric batteries
Assignee: Exide Technologies LLC
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Filing: 1955-01-07
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Granted: 1959-03-31
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Expires: 1975-01-07
Abstract
No abstract record available.
Inventors
- 👤 Leo E Pueher
- 👤 William A Cunningham
- 👤 Joseph F Szabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
THE METHOD OF MAKING A DENSE, LIGHT, POROUS NEGATIVE ELECTRODE OR PLATE FOR USE IN A BATTERY CELL WHICH COMPRISES FORMING A PASTE BY MIXING POWDERED ZINC OXIDE WITH 30% TO 35% POTASSIUM HYDROXIDE SOLUTION, PASTING THE MIXTURE UPON A SCREEN CONSISTING OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, BRONZE AND SILVER PROVIDED WITH A HARD NON-POROUS COATING OF ZINC, SUBSEQUENTLY FORMING THE PLATE IN A 5% POTASSIUM HYDROXIDE SOLUTION TO CONVERT THE ZINC OXIDE TO SPONGE ZINC, AND WASHING THE PLATE IN WATER ABOVE ABOUT 45*F. FOR NOT LESS THAN TWO HOURS TO REMOVE ALL TRACES OF POTASSIUM HYDROXIDE.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |