US2428470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass wool plate element for storage batteries
Assignee: Individual
•
Filing: 1942-02-02
•
Granted: 1947-10-07
•
Expires: 1962-02-02
Abstract
No abstract record available.
Inventors
- 👤 Milton A Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/431; H01M50/434; H01M50/437; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |