US2673230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator
Assignee: Individual
•
Filing: 1949-04-30
•
Granted: 1954-03-23
•
Expires: 1969-04-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/417; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1128232A
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US2010498A
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US2100029A
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US2176427A
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US2247091A
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US2297248A
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US2184373A
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US2142668A
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US2371868A
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US2410225A
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US2400091A
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US2465493A
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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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |