US2708909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way directional spool valve
Assignee: BE GE Mfg CO
•
Filing: 1954-03-15
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Granted: 1955-05-24
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Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 Curlett John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:14
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702; Y10T137/87169; Y10T137/87177; Y10T137/87185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030986A
Cited
FR986906A
Cited
US2619074A
Cited
US2517153A
Cited
US2448557A
Cited
US2631571A
Cited
US2633102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |