US3544878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for charging an accumulator battery
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1968-06-11
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Granted: 1970-12-01
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Expires: 1988-06-11
Abstract
No abstract record available.
Inventors
- 👤 Tadeusz Wolpert
- 👤 Leif Tage Hansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
H; H04; H04M; H04M19/00; H02; H02J; H02J7/00; H02J7/90; H02J7/94; H02J7/953; H04M19/08; Y; Y10; Y10S; Y10S320/00; Y10S320/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2197423A
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US2621316A
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US2423134A
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US2431312A
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US2660702A
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US2942170A
Cited
US2967988A
Cited
US3081426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |