US3000401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boundary layer flow control device
Assignee: Individual
•
Filing: 1960-01-29
•
Granted: 1961-09-19
•
Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Friedrich O Ringleb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
G; G01; G01M; G01M9/00; G01M9/06; G01M9/065; B; B64; B64C; B64C21/00; B64C21/02; B64C2230/00; B64C2230/08; B64C2230/20; B64C2230/24; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2899150A
Cited
FR441523A
Cited
US1580577A
Cited
US2037940A
Cited
GB476258A
Cited
US2375180A
Cited
FR988727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |