Patent US2707201A successfully refreshed from Google Patents.
US2707201A
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Porous storage battery separator and method of making
Assignee: Richardson Co
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Filing: 1951-05-05
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Granted: 1955-04-26
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Expires: 1971-05-05
Abstract
No abstract record available.
Inventors
- 👤 Gordon H Fernald
- 👤 Kenneth M Enloe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S424/00; Y10S424/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A STORAGE BATTERY SEPARATOR CONSISTING OF A THERMOPLASTIC RESINOUS BODY HAVING A MOLECULAR WEIGHT IN EXCESS OF SUBSTANTIALLY 25,000 AND HAVING A POROSITY RESULTING FROM THE INCORPORATION INTO SAID BODY OF AT LEAST SUBSTANTIALLY FOUR TIMES THE QUANTITY BY VOLUME (BASED ON THE QUANTITY OF ALL OTHER INGREDIENTS COMBINED) OF LEACHABLE SALT, SAID OTHER INGREDIENTS COMPRISING A VOLATILE SOLVENT AND A SURFACE-ACTIVE EXTENDER-PLASTICIZER, FOLLOWED BY THE REMOVAL OF SUBSTANTIALLY ALL OF SAID SALT AND OTHER INGREDIENTS.
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) | 1958-04-25 | 1958-10-25 | 1959-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-25 | 1962-10-25 | 1963-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-25 | 1966-10-25 | 1967-04-26 | $7700.00 | Window Closed / Lapsed |