US2803265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve device
Assignee: ACF Industries Inc
•
Filing: 1951-07-23
•
Granted: 1957-08-20
•
Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Irven E Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/106; F04B53/102; F04B53/103; F16; F16K; F16K15/00; F16K15/14; F16K15/148; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7861; Y10T137/7862; Y10T137/7863; Y10T137/7864; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |