US2504304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control system
Assignee: Elsag Bailey Inc
•
Filing: 1947-07-01
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Granted: 1950-04-18
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Expires: 1967-07-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph T Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:32
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/035; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/8593; Y10T137/86187; Y10T137/86196
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) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |