Patent US3444790A successfully refreshed from Google Patents.
US3444790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment of vanes to hydraulic rotary actuator wingshafts
Assignee: Houdaille Industries Inc
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Filing: 1967-01-31
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Granted: 1969-05-20
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Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Rollin Douglas Rumsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:27
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F16; F16D; F16D1/00; F16D1/06; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US118474A
Cited
US198481A
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US2556648A
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US2633105A
Cited
US2708907A
Cited
US2954012A
Cited
US3232185A
Cited
US3195421A
Cited
US3291006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |