Patent US2241847A successfully refreshed from Google Patents.
US2241847A
Expired / Lapsed
US
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Valve for multichambered tubes
Assignee: Wingfoot Corp
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Filing: 1940-03-23
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Granted: 1941-05-13
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Expires: 1960-03-23
Abstract
No abstract record available.
Inventors
- 👤 Boyd C Eberhard
- 👤 Selden T Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:55
CPC Classifications
B; B60; B60C; B60C29/00; B60C29/007; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/4673; Y10T137/4824; Y10T137/8593; Y10T137/877; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10522; Y10T152/10576; Y10T152/10612
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) | 1944-05-12 | 1944-11-11 | 1945-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-12 | 1948-11-11 | 1949-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-12 | 1952-11-11 | 1953-05-13 | $7700.00 | Window Closed / Lapsed |