US3544384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a laminated porous battery separator
Assignee: Tudor AB
•
Filing: 1968-05-07
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Granted: 1970-12-01
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Expires: 1988-05-07
Abstract
No abstract record available.
Inventors
- 👤 Erik Gustav Sundberg
- 👤 Arthur Korbol
- 👤 Ove Karl Gustaf Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M2300/00; H01M2300/0002; H01M2300/0005; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2850559A
Cited
US3055966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |