US2573231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot-operated relief valve
Assignee: Bendix Aviation Corp
•
Filing: 1947-12-26
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Granted: 1951-10-30
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter D Teague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:59
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2589; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7767; Y10T137/794; Y10T137/8085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738161A
Cited
US1248665A
Cited
US1615285A
Cited
US1612567A
Cited
US2408708A
Cited
US2487418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |