Patent US1109389A successfully refreshed from Google Patents.
Patent US2905188A successfully refreshed from Google Patents.
← Back to Patent Explorer
US2905188A Expired / Lapsed US ⏱️ 0.0 years remaining

Check valve

Assignee: ACF Industries Inc
•
Filing: 1956-11-16
•
Granted: 1959-09-22
•
Expires: 1976-11-16
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Burl C Loew

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 17:44
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/102; F04B53/103; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388; F02M2700/439; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

US1990516A Cited
US2090486A Cited
US2117504A Cited
US2576637A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1962-09-21 1963-03-23 1963-09-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1966-09-21 1967-03-23 1967-09-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1970-09-21 1971-03-23 1971-09-22 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag