US3528247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system for vtol aircraft
Assignee: MTU Aero Engines AG
•
Filing: 1968-03-11
•
Granted: 1970-09-15
•
Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Fritz Riemerschmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:13
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0075; B64C29/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US525487A
Cited
US2486272A
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US2912188A
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US3053477A
Cited
US3084508A
Cited
US3063241A
Cited
US3056258A
Cited
US3290885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |