US2589681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate
Assignee: National Battery Co
•
Filing: 1947-06-20
•
Granted: 1952-03-18
•
Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
- 👤 Dickover Marion Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/471; H01M50/474; H01M50/48; H01M50/486; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US309939A
Cited
DE555827C
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US693676A
Cited
GB139169A
Cited
GB265000A
Cited
GB300536A
Cited
US2157629A
Cited
US2195211A
Cited
FR844212A
Cited
US2490630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |