US3038543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air brake for wind driven propellers
Assignee: Hudson Engineering Corp
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Filing: 1960-10-03
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Granted: 1962-06-12
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene M Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:29
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/0244; F03D7/0252; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/30; F05B2240/307; F05B2260/00; F05B2260/90; F05B2260/901; F05B2260/9011; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y10; Y10S; Y10S415/00; Y10S415/905; Y10S415/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |