US3490954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-acid cell
Assignee: AT&T Inc
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Filing: 1968-10-31
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Granted: 1970-01-20
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Expires: 1988-10-31
Abstract
No abstract record available.
Inventors
- 👤 Louis D Babusci
- 👤 Biagio A Cretella
- 👤 David O Feder
- 👤 Donald E Koontz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/04; H01M10/0413; H01M10/0463; H01M10/0477; H01M10/06; H01M10/12; H01M50/00; H01M50/10; H01M50/172; H01M50/174; H01M50/179; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |