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Patent US2418792A successfully refreshed from Google Patents.
US2418792A
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US
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Storage battery electric heater
Assignee: Exide Technologies LLC
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Filing: 1945-03-24
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Granted: 1947-04-08
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Expires: 1965-03-24
Abstract
No abstract record available.
Inventors
- 👤 Riggs Harold Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/60; H01M10/61; H01M10/615; H01M10/65; H01M10/654; H01M10/657; H01M10/6571; H01M50/00; H01M50/20; H01M50/204; H01M10/653; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |