US2865459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anemo-electric power plant
Assignee: De Havilland Propellers Ltd
•
Filing: 1954-03-15
•
Granted: 1958-12-23
•
Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 Perdue Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:54
CPC Classifications
F; F03; F03D; F03D15/00; F03D15/05; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1272041A
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US1421208A
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US2279301A
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US2281871A
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FR878544A
Cited
US2321381A
Cited
US2485543A
Cited
US2629450A
Cited
US2517038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |