US2889388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dry-charged battery plates
Assignee: ELECTRIC STERAGE BATTERY Co
•
Filing: 1955-08-09
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Granted: 1959-06-02
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Csapo John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M4/16; H01M4/22; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE PRODUCTION OF DRY-CHARGED NEGATIVE BATTERY PLATES OF SUBSTANTIALLY PURE SPONGE LEAD, THE METHOD OF PREVENTING OXIDIATION OF THE SPONGE LEAD DURING THE DRYING OF THE PLATES, WHICH COMPRISES IMMERSING THE PLATES HAVING A SUBSTANTIAL MOISTURE CONTENT INTO PERCHLORETHYLENE, HEATING SAID PERCHLORETHYLENE TO MAINTAIN ITS TEMPERATURE ABOVE THE VAPORIZATION TEMPERATURE OF WATER, AFTER IMMERISON OF SAID PLATES IN SAID PERCHLORETHYLENE FOR A TIME ADEQUATE FOR REMOVAL OF SUBSTANTIALLY ALL MOISTURE FROM THE PLATES REMOVING THE PLATES THEREFROM, AND DRYING SAID PLATES BY EVAPORATING PERCHLORETHYLENE THEREFROM WHEREBY A RESIDUE OF SAID PERCHLORETHYLENE IS PROVIDED UPON SAID PLATES.
Claim 2
Dependent Claim
97 words
IN THE PRODUCTION OF DRY-CHARGED NEGATIVE BATTERY PLATES OF SUBSTANTIALLY PURE SPONGE LEAD, THE METHOD OF PREVENTING OXIDIATION OF THE SPONGE LEAD DURING THE DRYING OF THE PLATES, WHICH COMPRISES IMMERSING THE PLATES HAVING A SUBSTANTIAL MOISTURE CONTENT INTO PERCHLORETHYLENE, HEATING SAID PERCHLORETHYLENE TO MAINTAIN ITS TEMPERATURE ABOVE THE VAPORIZATION TEMPERATURE OF WATER, AFTER IMMERISON OF SAID PLATES IN SAID PERCHLORETHYLENE FOR A TIME ADEQUATE FOR REMOVAL OF SUBSTANTIALLY ALL MOISTURE FROM THE PLATES REMOVING THE PLATES THEREFROM, AND DRYING SAID PLATES BY EVAPORATING PERCHLORETHYLENE THEREFROM WHEREBY A RESIDUE OF SAID PERCHLORETHYLENE IS PROVIDED UPON SAID PLATES.
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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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |