US2923310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic lubricated sliding plug valve
Assignee: ACF Industries Inc
•
Filing: 1956-09-14
•
Granted: 1960-02-02
•
Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis F Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/36; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4379
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |