Patent US2839003A successfully refreshed from Google Patents.
US2839003A
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Combination flow control and relief valve
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1956-02-20
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Granted: 1958-06-17
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 John E Thrap
- 👤 Robert C Roller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:43
CPC Classifications
B; B62; B62D; B62D1/00; B62D1/02; B62D1/04; B62D1/06; B62D1/065; B62D5/00; B62D5/06; B62D5/062; F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2007; F04B1/22; F04B1/24; F04B49/00; F04B49/08; F04B49/22; F04B49/24; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0416; F15B13/0417; F16; F16K; F16K17/00; F16K17/02; F16K17/168; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2605
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |