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US2386268A Expired / Lapsed US ⏱️ 0.0 years remaining

Approach light

Assignee: Individual
•
Filing: 1938-01-18
•
Granted: 1945-10-09
•
Expires: 1958-01-18
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Abstract

No abstract record available.

Inventors

  • 👤 John M Roper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:06
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/0483; B64; B64D; B64D47/00; B64D47/02; B64D47/04

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1948-10-08 1949-04-09 1949-10-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1952-10-08 1953-04-09 1953-10-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1956-10-08 1957-04-09 1957-10-09 $7700.00 Window Closed / Lapsed

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