Patent US3022367A successfully refreshed from Google Patents.
US3022367A
Expired / Lapsed
US
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Separator for electric batteries
Assignee: Yardney International Corp
•
Filing: 1958-04-23
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Granted: 1962-02-20
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Expires: 1978-04-23
Abstract
No abstract record available.
Inventors
- 👤 Horowitz Carl
- 👤 Mendelsohn Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:00
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
40 words
AN INTERELECTRODE SEPARATOR FOR ELECTROCHEMICAL CELLS, COMPRISING A PERMEABLE SUPPORT COATED WITH A SEMI-PERMEABLE FILM COMPOSED OF A HOMOGENEOUS MIXTURE OF A POLYVINYL COMPOUND, IN A PROPORTION RANGING BETWEEN 20% AND 80% BY WEIGHT OF SAID FILM, WITH METHYL CELLULOSE.
Claim 2
Dependent Claim
40 words
AN INTERELECTRODE SEPARATOR FOR ELECTROCHEMICAL CELLS, COMPRISING A PERMEABLE SUPPORT COATED WITH A SEMI-PERMEABLE FILM COMPOSED OF A HOMOGENEOUS MIXTURE OF A POLYVINYL COMPOUND, IN A PROPORTION RANGING BETWEEN 20% AND 80% BY WEIGHT OF SAID FILM, WITH METHYL CELLULOSE.
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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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |