US2931616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe fluid pressure responsive valve
Assignee: Fairchild Engine and Airplane Corp
•
Filing: 1956-07-03
•
Granted: 1960-04-05
•
Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 James S White
- 👤 Walter H Rucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:04
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |