Patent US4535366A successfully refreshed from Google Patents.
US3388694A
Expired / Lapsed
US
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Adjustable-pitch engine cooling fan and servocontrol mechanism therefor
Assignee: Dynair Ltd
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Filing: 1966-05-24
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Granted: 1968-06-18
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Expires: 1986-05-24
Abstract
No abstract record available.
Inventors
- 👤 Elmer Arthur Ernest Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:41
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; F01; F01P; F01P7/00; F01P7/02; F01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2454182A
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US2553214A
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US2637308A
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US2725185A
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US2808817A
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US3014568A
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US3026942A
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US3220484A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |