US2617408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve and system for the protection of aircraft occupants
Assignee: Individual
•
Filing: 1947-02-26
•
Granted: 1952-11-11
•
Expires: 1967-02-26
Abstract
No abstract record available.
Inventors
- 👤 David M Clark
- 👤 Henry W Wilder
- 👤 Earl H Wood
- 👤 George A Hallenbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
B; B64; B64D; B64D10/00; B64D25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0777
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |