Patent US2642747A successfully refreshed from Google Patents.
US2642747A
Expired / Lapsed
US
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Air volume regulator
Assignee: American Machine and Metals Inc
•
Filing: 1946-12-04
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Granted: 1953-06-23
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Expires: 1966-12-04
Abstract
No abstract record available.
Inventors
- 👤 Ambrose E Van Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/313; Y10T137/3133; Y10T137/7287; Y10T137/7297; Y10T137/7358; Y10T137/7439; Y10T137/7485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2004417A
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US1928443A
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US1959259A
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US1983106A
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US2186786A
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US2362456A
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US2365649A
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US2381640A
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US2462023A
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US2426701A
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US2608207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |