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US2084294A Expired / Lapsed US ⏱️ 0.0 years remaining

Check valve

Assignee: General Electric Co
•
Filing: 1934-11-15
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Granted: 1937-06-15
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Expires: 1954-11-15
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Abstract

No abstract record available.

Inventors

  • 👤 Kenneth K Cooper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 02:23
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/021; F16K15/023; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7722; Y10T137/7837; Y10T137/7904

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1940-06-14 1940-12-14 1941-06-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1944-06-14 1944-12-14 1945-06-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1948-06-14 1948-12-14 1949-06-15 $7700.00 Window Closed / Lapsed

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