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US1829037A Expired / Lapsed US ⏱️ 0.0 years remaining

Switch for signaling systems

Assignee: Individual
•
Filing: 1929-07-12
•
Granted: 1931-10-27
•
Expires: 1949-07-12
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Abstract

No abstract record available.

Inventors

  • 👤 Bornett L Bobroff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 03:13
CPC Classifications
H; H01; H01H; H01H23/00; H01H23/02; H01H23/025; G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G9/04785; G05G2009/04703; G05G2009/04707; G05G2009/0474; G05G2009/04744; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1934-10-26 1935-04-27 1935-10-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1938-10-26 1939-04-27 1939-10-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1942-10-26 1943-04-27 1943-10-27 $7700.00 Window Closed / Lapsed

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