US2472181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller governor
Assignee: Wright Aeronautical Corp
•
Filing: 1944-07-07
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Granted: 1949-06-07
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Expires: 1964-07-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick W Werth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; G; G05; G05D; G05D13/00; G05D13/08; G05D13/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US683688A
Cited
US664392A
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US805392A
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US959853A
Cited
US1509695A
Cited
GB415112A
Cited
US2346856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |