US3455268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonsymmetric shroud-propeller combination for directional control
Assignee: SAMUEL J GORDON
•
Filing: 1966-10-13
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Granted: 1969-07-15
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Expires: 1986-10-13
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:38
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63H25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1519580A
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US2510561A
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US2693920A
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US3244135A
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US3115112A
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US3099240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |