US2575415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ducted spinner inlet
Assignee: RTX Corp
•
Filing: 1948-10-15
•
Granted: 1951-11-20
•
Expires: 1968-10-15
Abstract
No abstract record available.
Inventors
- 👤 Theodore E Grimac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:15
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/047; F02C7/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB130414A
Cited
US1430066A
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US1537690A
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US1774301A
Cited
US1907454A
Cited
FR768647A
Cited
US2158863A
Cited
US2396598A
Cited
US2397357A
Cited
US2435836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |