US2420394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloading valve for hydraulic circuits
Assignee: CREAD ENGINEERING AND RES COMP
•
Filing: 1945-12-10
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Granted: 1947-05-13
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Expires: 1965-12-10
Abstract
No abstract record available.
Inventors
- 👤 Wilbert M Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:15
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/027; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/101; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2612; Y10T137/2615
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2400039A
Cited
US2401845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |