US2499663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for thermally controlled battery chargers
Assignee: STERLINGWORTH Co
•
Filing: 1949-06-08
•
Granted: 1950-03-07
•
Expires: 1969-06-08
Abstract
No abstract record available.
Inventors
- 👤 Lewis A Medlar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:30
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/04; H02J7/06; H02J7/08; H02J7/90; H02J7/971; H02J7/975; H02J7/977; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US976747A
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US976748A
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US1098692A
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US1256065A
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US1558076A
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US1634176A
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US1954931A
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US2310514A
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US2296924A
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US2354877A
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US2392737A
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US2413865A
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US2377596A
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US2402695A
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US2432069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |