US3396905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducted fan
Assignee: Motors Liquidation Co
•
Filing: 1966-09-28
•
Granted: 1968-08-13
•
Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 Johnson Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:19
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/022; F01D5/12; F01D5/22; F01D5/225; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1554614A
Cited
US2169233A
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GB577017A
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FR905229A
Cited
US2407223A
Cited
US2454115A
Cited
US2526281A
Cited
GB670665A
Cited
US2772854A
Cited
GB878934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |