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US861566A Expired / Lapsed US ⏱️ 0.0 years remaining

Flap-valve.

Assignee: Individual
•
Filing: 1907-03-07
•
Granted: 1907-07-30
•
Expires: 1927-03-07
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Abstract

No abstract record available.

Inventors

  • 👤 Eduard Wiki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:10
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0416; F15B13/0417; F16; F16K; F16K15/00; F16K15/14; F16K15/1401; F16K15/1402; F16K15/148; F16K15/1481; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/7887; Y10T137/8593; Y10T137/87169

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) 1910-07-29 1911-01-28 1911-07-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1914-07-29 1915-01-28 1915-07-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1918-07-29 1919-01-28 1919-07-30 $7700.00 Window Closed / Lapsed

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