US2516795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve rotating device
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1946-08-28
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Granted: 1950-07-25
•
Expires: 1966-08-28
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/32; Y; Y10; Y10T; Y10T137/00; Y10T137/6198; Y10T137/6253; Y10T74/00; Y10T74/18; Y10T74/18016
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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |