US3068642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive means for land, water and aircraft
Assignee: FORSCHUNGSZENTRUM DER LUFTFAHR
•
Filing: 1959-11-17
•
Granted: 1962-12-18
•
Expires: 1979-11-17
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:07
CPC Classifications
B; B63; B63H; B63H11/00; B64; B64C; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2327744A
Cited
US2557435A
Cited
US2599103A
Cited
US2763125A
Cited
US2825204A
Cited
US2758805A
Cited
GB789836A
Cited
US2952123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |