US2622688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinner construction with boundary layer control
Assignee: RTX Corp
•
Filing: 1949-12-06
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Granted: 1952-12-23
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Expires: 1969-12-06
Abstract
No abstract record available.
Inventors
- 👤 John G Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:44
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/14; B64C2230/00; B64C2230/28; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y02T50/60
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |