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US631036A Expired / Lapsed US ⏱️ 0.0 years remaining

Reversible check-valve.

Assignee: Individual
•
Filing: 1899-02-04
•
Granted: 1899-08-15
•
Expires: 1919-02-04
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Abstract

No abstract record available.

Inventors

  • 👤 George M Crump

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 06:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5153; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7856

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) 1902-08-15 1903-02-14 1903-08-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1906-08-15 1907-02-14 1907-08-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1910-08-15 1911-02-14 1911-08-16 $7700.00 Window Closed / Lapsed

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