US2887990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift cylinder regulator valve
Assignee: Case LLC
•
Filing: 1954-06-01
•
Granted: 1959-05-26
•
Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Richard E Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2225518A
Cited
US2252418A
Cited
US2367682A
Cited
US2590454A
Cited
US2628731A
Cited
US2646025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |