US2954960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-floating seat structure for expanding gate valves
Assignee: ACF Industries Inc
•
Filing: 1956-12-24
•
Granted: 1960-10-04
•
Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Dunbar
- 👤 James H Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:18
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/184; F16K3/186; F16K3/30; F16K3/36; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20101E
Cited
US1803889A
Cited
US2317657A
Cited
US2810542A
Cited
US2747600A
Cited
US2810543A
Cited
US2776813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |