US2985422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sealing valve
Assignee: ACF Industries Inc
•
Filing: 1957-10-30
•
Granted: 1961-05-23
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Anderson
- 👤 Ronald A Gulick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732170A
Cited
US1157956A
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US2373628A
Cited
US2606740A
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US2516947A
Cited
GB749932A
Cited
US2864580A
Cited
US2810543A
Cited
US2837308A
Cited
US2908293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |