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US2540174A
Expired / Lapsed
US
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Battery testing and charging apparatus
Assignee: Black and Decker Corp
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Filing: 1946-10-12
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Granted: 1951-02-06
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Expires: 1966-10-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert H Riley
- 👤 Thomas W Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:40
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1681265A
Cited
US2285620A
Cited
US2296924A
Cited
US2347452A
Cited
US2366505A
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US2421828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |