US2240457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonspill vent plug
Assignee: Exide Technologies LLC
•
Filing: 1940-05-25
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Granted: 1941-04-29
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Expires: 1960-05-25
Abstract
No abstract record available.
Inventors
- 👤 Graf Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; H; H01; H01M; H01M50/00; H01M50/30; H01M50/308; H01M50/60; H01M50/609; H01M50/627; H01M50/636; H01M50/645; H01M50/655; H01M50/668; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874
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) | 1944-04-28 | 1944-10-28 | 1945-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-28 | 1948-10-28 | 1949-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-28 | 1952-10-28 | 1953-04-29 | $7700.00 | Window Closed / Lapsed |