US2879957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid sustained aircraft
Assignee: Collins Radio Co
•
Filing: 1954-08-02
•
Granted: 1959-03-31
•
Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Lippisch Alexander Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C39/062; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR558943A
Cited
US1564718A
Cited
US1690773A
Cited
US1864912A
Cited
US1910098A
Cited
US2384893A
Cited
FR893866A
Cited
US2476482A
Cited
US2665083A
Cited
FR1037666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |