US2767725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure ratio regulator
Assignee: MARQUARDT AIRCRAFT Co
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Filing: 1953-06-22
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Granted: 1956-10-23
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Henry A Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:31
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; G05D16/185; F; F01; F01D; F01D17/00; F01D17/02; F01D17/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452; Y10T137/2496; Y10T137/2514; Y10T137/2521
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |