US2883147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism
Assignee: Fairchild Engine and Airplane Corp
•
Filing: 1953-08-26
•
Granted: 1959-04-21
•
Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Rio N Mirza
- 👤 David M Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
F; F16; F16K; F16K13/00; F16K13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US708990A
Cited
US715745A
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US712350A
Cited
US2214194A
Cited
US2653004A
Cited
CH268772A
Cited
GB674771A
Cited
US2664267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |