Patent US2655552A successfully refreshed from Google Patents.
US2655552A
Expired / Lapsed
US
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Separator for electric secondary batteries
Assignee: Individual
•
Filing: 1949-08-30
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Granted: 1953-10-13
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Expires: 1969-08-30
Abstract
No abstract record available.
Inventors
- 👤 Fuller Leonard
- 👤 Szper Jonas Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:23
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/449; H01M50/457; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A SPACE FILLING SEPARATOR FOR USE IN SECONDARY BATTERIES OF THE DRY TYPE WHEREIN THE ELECTROLYTE IS ABSORBED IN THE SEPARATORS, SAID SEPARATOR COMPRISING A LAMINATE CONSISTING OF A RELATIVELY THICK LAYER OF POWDERED ABSORBENT LIGHTLY HELD TOGETHER BY A BINDER AND SUPPORTED ON A RELATIVELY THIN SHEET OF ABSORBENT PAPER WHICH IS INITIALLY IMPERVIOUS TO PASSAGE OF THE ABSORBENT POWDER THEREINTO OR THERETHROUGH AND YET IS SUBJECT TO ULTIMATE DISSOLUTION IN THE ELECTROLYTE OF A BATTERY ASSEMBLY, SAID LAYER OF POWDERED ABSORBENT BEING COMPOSED OF KIESELGUHR PARTICLES BOUND TOGETHER BY APPROXIMATELY FIFTEEN PER CENT BY WEIGHT OF PRE-VULCANIZED RUBBER LATEX.
Claim 2
Dependent Claim
101 words
A SPACE FILLING SEPARATOR FOR USE IN SECONDARY BATTERIES OF THE DRY TYPE WHEREIN THE ELECTROLYTE IS ABSORBED IN THE SEPARATORS, SAID SEPARATOR COMPRISING A LAMINATE CONSISTING OF A RELATIVELY THICK LAYER OF POWDERED ABSORBENT LIGHTLY HELD TOGETHER BY A BINDER AND SUPPORTED ON A RELATIVELY THIN SHEET OF ABSORBENT PAPER WHICH IS INITIALLY IMPERVIOUS TO PASSAGE OF THE ABSORBENT POWDER THEREINTO OR THERETHROUGH AND YET IS SUBJECT TO ULTIMATE DISSOLUTION IN THE ELECTROLYTE OF A BATTERY ASSEMBLY, SAID LAYER OF POWDERED ABSORBENT BEING COMPOSED OF KIESELGUHR PARTICLES BOUND TOGETHER BY APPROXIMATELY FIFTEEN PER CENT BY WEIGHT OF PRE-VULCANIZED RUBBER LATEX.
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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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |