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US2748948A Expired / Lapsed US ⏱️ 0.0 years remaining

Filtering device

Assignee: Bendix Aviation Corp
•
Filing: 1950-08-15
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Granted: 1956-06-05
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Expires: 1970-08-15
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Abstract

No abstract record available.

Inventors

  • 👤 Guy C Fricke
  • 👤 Kasten Walter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 21:26
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/88; B01D29/90; B01D29/902

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US2218339A Cited
US2230174A Cited
US2239868A Cited
US2347927A Cited
US2401039A Cited
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US2429321A Cited
US2468603A Cited
CH252127A Cited
US2537897A Cited
US2547857A Cited
US2683536A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1959-06-05 1959-12-05 1960-06-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1963-06-05 1963-12-05 1964-06-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1967-06-05 1967-12-05 1968-06-05 $7700.00 Window Closed / Lapsed

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