Patent US2824429A successfully refreshed from Google Patents.
US2824429A
Expired / Lapsed
US
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Means for circulating and distributing air
Assignee: Mitchell Manufacturing Co
•
Filing: 1955-06-08
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Granted: 1958-02-25
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Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 Armand S Zucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:12
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F1/00; F24F1/02; F24F1/028; F24F1/0284; F24F1/0328; F24F1/0373; F24F1/0375; F24F13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1493158A
Cited
US1611049A
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US1772296A
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US1957307A
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US2000112A
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US1990801A
Cited
US2134649A
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US2240784A
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US2357362A
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US2526391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |