Patent US3085631A successfully refreshed from Google Patents.
US3085631A
Expired / Lapsed
US
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Propeller fan blades
Assignee: Svenska Flaktfabriken AB
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Filing: 1959-05-29
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Granted: 1963-04-16
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Expires: 1979-05-29
Abstract
No abstract record available.
Inventors
- 👤 Dagrell Knut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:57
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968540A
Cited
GB369478A
Cited
FR812018A
Cited
US2248221A
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US2259247A
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GB538698A
Cited
US2426400A
Cited
GB575578A
Cited
US2430854A
Cited
US2665054A
Cited
US2814350A
Cited
US2844207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |