US2724406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1951-04-19
•
Granted: 1955-11-22
•
Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 John F Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:33
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; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US582445A
Cited
US934083A
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US2333522A
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US2351871A
Cited
US2388820A
Cited
US2366596A
Cited
US2451925A
Cited
US2375077A
Cited
US2639725A
Cited
US2580128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |