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US2236477A Expired / Lapsed US ⏱️ 0.0 years remaining

Check valve

Assignee: AUGUSTUS J BAKER
•
Filing: 1939-11-13
•
Granted: 1941-03-25
•
Expires: 1959-11-13
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Abstract

No abstract record available.

Inventors

  • 👤 Fuchs Julius

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 05:07
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/1402; F16K15/145; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7859; Y10T137/7879; Y10T137/7888; Y10T137/7889; Y10T137/794; Y10T137/8122

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1944-03-24 1944-09-23 1945-03-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1948-03-24 1948-09-23 1949-03-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1952-03-24 1952-09-23 1953-03-25 $7700.00 Window Closed / Lapsed

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