US2496859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charger
Assignee: HEYER IND Inc
•
Filing: 1946-05-08
•
Granted: 1950-02-07
•
Expires: 1966-05-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Dalzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:23
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50; H02J7/575
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1143818A
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US1362794A
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US1396242A
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US1743593A
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US1743160A
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FR699748A
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US1993914A
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US2101571A
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US2173736A
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US2375866A
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US2390771A
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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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |