US2433206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air control valve
Assignee: Alco Valve Co
•
Filing: 1942-05-11
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Granted: 1947-12-23
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Expires: 1962-05-11
Abstract
No abstract record available.
Inventors
- 👤 John E Dube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; G; G05; G05D; G05D16/00; G05D16/024; G05D16/14; G05D16/16; G05D16/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR679386A
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US2002057A
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US2119402A
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US2181199A
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US2194749A
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US2208554A
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US2265461A
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GB521623A
Cited
US2284984A
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US2307199A
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US2289639A
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US2316416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |