US2555341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parachute release mechanism
Assignee: ADELINE GRAY JOHNSON
•
Filing: 1947-02-12
•
Granted: 1951-06-05
•
Expires: 1967-02-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:09
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/40; B64D17/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1709264A
Cited
US1944795A
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US2175634A
Cited
US2353440A
Cited
US2365445A
Cited
US2504148A
Cited
GB585265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |