Patent US2898539A successfully refreshed from Google Patents.
US2898539A
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US
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Battery charging apparatus
Assignee: Koehler Manufacturing Co
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Filing: 1956-07-03
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Granted: 1959-08-04
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Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Homer A Lozeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J2207/00; H02J2207/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2324188A
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US2286101A
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US2341446A
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US2600249A
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US2383722A
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US2377180A
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US2423134A
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US2431312A
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US2505620A
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |