US2673051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parachute means for landing aircraft
Assignee: Lockheed Martin Corp
•
Filing: 1951-05-22
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Granted: 1954-03-23
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Expires: 1971-05-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/02; B64D; B64D25/00; B64D25/08; B64D25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1023233A
Cited
US1019858A
Cited
FR432059A
Cited
US1138140A
Cited
US1341794A
Cited
US2328786A
Cited
US2440003A
Cited
US2549407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |