US2631183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent cap hydrometer for electric storage batteries
Assignee: Individual
•
Filing: 1951-01-17
•
Granted: 1953-03-10
•
Expires: 1971-01-17
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Babis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:40
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; G; G01; G01R; G01R31/00; G01R31/36; G01R31/378; 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)
US907487A
Cited
US1301516A
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US1354255A
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US1482852A
Cited
GB271635A
Cited
US1697353A
Cited
US2469560A
Cited
US2512757A
Cited
US2484163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |