Patent US2653987A successfully refreshed from Google Patents.
US2653987A
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Porous material usfeful in battery separators
Assignee: Cresset Res Corp
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Filing: 1949-08-24
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Granted: 1953-09-29
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Expires: 1969-08-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Baty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
26 words
A POROUS MATERIAL COMPRISING A CONTINUOUS SILICAL AEROGEL PHASE AND, INTIMATELY INCORPORATED THEREIN, POLYSTYRENE, WOOD FLOUR AND A SMALL AMOUNT OF AN ALKALINE EARTH METAL CARBONATE.
References Cited (Backward Citations)
US2176427A
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US2181299A
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US2302832A
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US2329322A
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US2302833A
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GB537377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |