US2889390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making battery separator
Assignee: HAMER H JAMIESON
•
Filing: 1955-05-09
•
Granted: 1959-06-02
•
Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/222; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/13; H; H01; H01M; H01M50/00; H01M50/40; H01M50/403; H01M50/406; 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: 0
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References Cited (Backward Citations)
US2297248A
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US2374540A
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US2371868A
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US2482062A
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US2605506A
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US2636851A
Cited
GB679514A
Cited
US2787809A
Cited
US2662929A
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GB737111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |