US2508043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making battery separators
Assignee: Globe Union Inc
•
Filing: 1944-12-28
•
Granted: 1950-05-16
•
Expires: 1964-12-28
Abstract
No abstract record available.
Inventors
- 👤 John F Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
C; C08; C08H; C08H8/00; D; D21; D21J; D21J1/00; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/429; H01M50/4295; H01M50/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2343215A
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US128978A
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US119464A
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US1716623A
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GB190908325A
Cited
US1501925A
Cited
US1389936A
Cited
US1614025A
Cited
US1682834A
Cited
US1634603A
Cited
US1792254A
Cited
US1873056A
Cited
US2247208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |