US2987027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller thrust stabilizer control
Assignee: Individual
•
Filing: 1957-09-16
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Granted: 1961-06-06
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Wanzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206; G05D1/0208; B; B63; B63H; B63H25/00; B63H25/42; E; E21; E21B; E21B7/00; E21B7/12; E21B7/128; B63H2025/425
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |