Patent US2662541A successfully refreshed from Google Patents.
US2662541A
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Flow controlling apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1948-02-28
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Granted: 1953-12-15
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Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 Noon T Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:50
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2559; Y10T137/2564; Y10T137/7722; Y10T137/7837; Y10T137/7847
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |