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US2827922A Expired / Lapsed US ⏱️ 0.0 years remaining

Stream-lined check-valve

Assignee: Individual
•
Filing: 1954-04-22
•
Granted: 1958-03-25
•
Expires: 1974-04-22
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Abstract

No abstract record available.

Inventors

  • 👤 Guinard Paul Andre

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 09:18
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7559; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/792; Y10T137/794; Y10T137/8122

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US608342A Cited
FR959994A Cited
US1076128A Cited
US1212148A Cited
US1190402A Cited
US1466171A Cited
US1661424A Cited
US2114921A Cited
US2061852A Cited
US2107200A Cited
GB578738A Cited
US2421329A Cited
US2577851A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1961-03-24 1961-09-23 1962-03-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1965-03-24 1965-09-23 1966-03-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1969-03-24 1969-09-23 1970-03-25 $7700.00 Window Closed / Lapsed

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