US2845939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined metering valve and flow distributor
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1953-10-29
•
Granted: 1958-08-05
•
Expires: 1973-10-29
Abstract
No abstract record available.
Inventors
- 👤 Frank C Bayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2657; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87764
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877576A
Cited
US2127172A
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US810590A
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US790584A
Cited
US1680750A
Cited
US2395384A
Cited
US2588348A
Cited
US2622610A
Cited
US2706520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |