Patent FR897728A successfully refreshed from Google Patents.
Patent US2830767A successfully refreshed from Google Patents.
US2830767A
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US
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Selector valve
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1956-01-06
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Granted: 1958-04-15
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Expires: 1976-01-06
Abstract
No abstract record available.
Inventors
- 👤 Edward J Herbenar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:17
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/023; F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/056; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1549745A
Cited
GB194366A
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US1773976A
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US1989585A
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US2265117A
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US2257442A
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US2371428A
Cited
US2600650A
Cited
US2751152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |