US2624768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran battery separator plate
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1951-07-23
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Granted: 1953-01-06
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Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:52
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/414; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A LIQUID PERMEABLE BATTERY SEPARATOR PLATE CONSISTING OF A THIN ACID RESISTANT POROUS SHEET COMPOSED OF DEXTRAN AND A POLYMERIZED RESIN.
Claim 2
Dependent Claim
21 words
A LIQUID PERMEABLE BATTERY SEPARATOR PLATE CONSISTING OF A THIN ACID RESISTANT POROUS SHEET COMPOSED OF DEXTRAN AND A POLYMERIZED RESIN.
References Cited (Backward Citations)
US2315366A
Cited
US2421831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |