US2857295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving electric storage batteries
Assignee: Udylite Research Corp
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Filing: 1955-02-28
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Granted: 1958-10-21
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Brown Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:33
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/02; H01M10/24; H01M10/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF IMPROVING ELECTRIC STORAGE BATTERIES WHICH COMPRISES THE STEP OF ADDING TO THE ELECTROLYTE A PERFLUOROALKANE ACID CONTAINING AT LEAST 5 AND NOT MORE THAN 10 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF SULFONIC AND CARBOXYLIC ACIDS IN AN AMOUNT IN THE RANG OF ABOUT 0.005 G./L. TO SATURATION.
Claim 2
Independent Claim
53 words
THE METHOD OF IMPROVING ELECTRIC STORAGE BATTERIES WHICH COMPRISES THE STEP OF ADDING TO THE ELECTROLYTE A PERFLUOROALKANE ACID CONTAINING AT LEAST 5 AND NOT MORE THAN 10 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF SULFONIC AND CARBOXYLIC ACIDS IN AN AMOUNT IN THE RANG OF ABOUT 0.005 G./L. TO SATURATION.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |