Patent US2948111A successfully refreshed from Google Patents.
US2948111A
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US
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Means to increase static pressure and enhance forward thrust of aircraft components
Assignee: Doak Aircraft Co Inc
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Filing: 1955-05-02
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Granted: 1960-08-09
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Norman E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:34
CPC Classifications
B; B64; B64D; B64D33/00; B64D33/02; B64C; B64C11/00; B64C11/001; B64C3/00; B64C3/38; B64C3/44; B64C3/46; B64D29/00; F; F02; F02C; F02C7/00; F02C7/04; F02C7/042; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y10; Y10T; Y10T137/00; Y10T137/0536
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) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |