US2692101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroski and float aircraft take-off and landing ramp
Assignee: All American Engineering Co
•
Filing: 1950-03-24
•
Granted: 1954-10-19
•
Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Donald B Doolittle
- 👤 Jack R Walden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/22; B64F1/221
Claims Analysis
Total Claims: 0
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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) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |