Patent US2662686A successfully refreshed from Google Patents.
US2662686A
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Fan wheel
Assignee: EDMUND E HANS
•
Filing: 1952-04-18
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Granted: 1953-12-15
•
Expires: 1972-04-18
Abstract
No abstract record available.
Inventors
- 👤 Donald F Wuerfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:57
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1498790A
Cited
US1734541A
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US1892930A
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US2231062A
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US2209028A
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US2362868A
Cited
US2537805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |