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Patent US2278631A successfully refreshed from Google Patents.
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US2278631A Expired / Lapsed US ⏱️ 0.0 years remaining

Boring tool

Assignee: ECLIPSE COUNTERBORE Co
•
Filing: 1939-03-22
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Granted: 1942-04-07
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Expires: 1959-03-22
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Abstract

No abstract record available.

Inventors

  • 👤 Young William Kyle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 17:35
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03446; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2202; Y10T407/2212; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8585; Y10T408/8588; Y10T408/85892

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) 1945-04-06 1945-10-06 1946-04-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1949-04-06 1949-10-06 1950-04-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1953-04-06 1953-10-06 1954-04-07 $7700.00 Window Closed / Lapsed

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