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US2801058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saucer-shaped aircraft
Assignee: Individual
•
Filing: 1950-12-06
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Granted: 1957-07-30
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Constantin P Lent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:43
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C39/062; B64C39/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1440242A
Cited
GB221790A
Cited
US1660257A
Cited
US1846125A
Cited
US1911041A
Cited
GB406971A
Cited
US2014051A
Cited
US2077471A
Cited
US2377835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |