Patent US2650339A successfully refreshed from Google Patents.
US2650339A
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US
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Battery charging apparatus
Assignee: MCCOLPIN CHRISTIE CORP
•
Filing: 1951-09-15
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Granted: 1953-08-25
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Expires: 1971-09-15
Abstract
No abstract record available.
Inventors
- 👤 Soren L Christie
- 👤 Frank C Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:19
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/975; H02J7/977; H02J7/02; H02J7/04; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19; Y10S320/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2161495A
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US2226185A
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US2432068A
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US2354877A
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US2347452A
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US2421828A
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US2431707A
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US2478279A
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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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |