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US3387625A Expired / Lapsed US ⏱️ 0.0 years remaining

Check valve

Assignee: W-L Molding Co
•
Filing: 1965-06-24
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Granted: 1968-06-11
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Expires: 1985-06-24
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Abstract

No abstract record available.

Inventors

  • 👤 George R Laure

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 04:57
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927; Y10T137/7929; Y10T137/7937; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/49925; Y10T29/49927

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US3181555A Cited
US1051004A Cited
US2074195A Cited
FR819117A Cited
US2617624A Cited
US2692751A Cited
US2855127A Cited
US2862497A Cited
US2999499A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-06-11 1971-12-11 1972-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-06-11 1975-12-11 1976-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-06-11 1979-12-11 1980-06-11 $7700.00 Window Closed / Lapsed

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