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US989018A Expired / Lapsed US ⏱️ 0.0 years remaining

Alternating-current magnet.

Assignee: ALONZO B SEE
•
Filing: 1910-10-27
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Granted: 1911-04-11
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Expires: 1930-10-27
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Abstract

No abstract record available.

Inventors

  • 👤 Nils O Lindstrom

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 03:41
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/10; H01F7/12

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) 1914-04-10 1914-10-10 1915-04-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1918-04-10 1918-10-10 1919-04-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1922-04-10 1922-10-10 1923-04-11 $7700.00 Window Closed / Lapsed

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