US2482062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage battery separator of polystyrene fiber
Assignee: Dow Chemical Co
•
Filing: 1945-01-19
•
Granted: 1949-09-13
•
Expires: 1965-01-19
Abstract
No abstract record available.
Inventors
- 👤 Alden W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/414; H01M50/417; H01M50/489; H01M50/491; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S162/00; Y10S162/03; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/26; Y10T428/266; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 0
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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) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |