US2563138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump regulator
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1946-08-21
•
Granted: 1951-08-07
•
Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
F; F02; F02B; F02B1/00; F02M; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2703; Y10T137/2708
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476755A
Cited
US822184A
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US1885565A
Cited
US2280128A
Cited
US2392565A
Cited
US2365650A
Cited
US2446051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |