US2953152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating valve
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1956-08-17
•
Granted: 1960-09-20
•
Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:40
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; F; F02; F02K; F02K9/00; F02K9/80; F02K9/805; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/781; Y10T137/7811; Y10T137/7835; Y10T137/7836; Y10T137/8593; Y10T137/87265; Y10T137/8733
Claims Analysis
Total Claims: 0
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US449222A
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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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |