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US2608186A Expired / Lapsed US ⏱️ 0.0 years remaining

Spark plug

Assignee: Individual
•
Filing: 1949-01-24
•
Granted: 1952-08-26
•
Expires: 1969-01-24
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Abstract

No abstract record available.

Inventors

  • 👤 Joseph E Hudson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:34
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/40; H01T13/41

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

NL54723C Cited
US853425A Cited
US913453A Cited
US2168206A Cited
US2269076A Cited
US2359421A Cited
US2355163A Cited
US2300646A Cited
US2357602A Cited
US2501826A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1955-08-26 1956-02-25 1956-08-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1959-08-26 1960-02-25 1960-08-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1963-08-26 1964-02-25 1964-08-26 $7700.00 Window Closed / Lapsed

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