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US1281372A
Expired / Lapsed
US
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Electric-battery depolarizer.
Assignee: National Carbon Co Inc
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Filing: 1918-02-21
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Granted: 1918-10-15
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Expires: 1938-02-21
Abstract
No abstract record available.
Inventors
- 👤 Major E Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:39
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1921-10-14 | 1922-04-15 | 1922-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-10-14 | 1926-04-15 | 1926-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-10-14 | 1930-04-15 | 1930-10-15 | $7700.00 | Window Closed / Lapsed |