Patent US2639087A successfully refreshed from Google Patents.
US2639087A
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US
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Axial flow fan
Assignee: Joy Manufacturing Co
•
Filing: 1947-11-04
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Granted: 1953-05-19
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Expires: 1967-11-04
Abstract
No abstract record available.
Inventors
- 👤 Charles F Goede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:55
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236; Y10T29/49245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1888613A
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US1932391A
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US2089601A
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US2134142A
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US2178401A
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US2423750A
Cited
US2427032A
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US2494772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |