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US3430648A Expired / Lapsed US ⏱️ 0.0 years remaining

Vent check valve

Assignee: Fruehauf Corp
•
Filing: 1966-08-19
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Granted: 1969-03-04
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Expires: 1986-08-19
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Abstract

No abstract record available.

Inventors

  • 👤 Lawrence A Botkin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 20:19
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; F16K15/00; F16K15/14; F16K15/141; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874; Y10T137/7722; Y10T137/7771; Y10T137/7837; Y10T137/7866

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

FR76115E Cited
US3179122A Cited
US3150683A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1972-03-03 1972-09-02 1973-03-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1976-03-03 1976-09-02 1977-03-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1980-03-03 1980-09-02 1981-03-04 $7700.00 Window Closed / Lapsed

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