Patent US1697143A successfully refreshed from Google Patents.
US2197356A
Expired / Lapsed
US
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Specific gravity marker plug for storage batteries
Assignee: Exide Technologies LLC
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Filing: 1937-12-08
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Granted: 1940-04-16
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Expires: 1957-12-08
Abstract
No abstract record available.
Inventors
- 👤 George H B West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:07
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M10/484; H01M50/00; H01M50/30; H01M50/308; 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) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |