US2650752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boundary layer control in blowers
Assignee: RTX Corp
•
Filing: 1949-08-27
•
Granted: 1953-09-01
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Henry H Hoadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
F; F04; F04D; F04D21/00; B; B64; B64C; B64C23/00; B64C23/06; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/66; F04D29/68; F04D29/681; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2041793A
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US2194890A
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US2260786A
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GB555646A
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US2472357A
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US2558816A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |