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US1558846A Expired / Lapsed US ⏱️ 0.0 years remaining

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Assignee: PROCESS ENGINEERS Inc
•
Filing: 1925-07-14
•
Granted: 1925-10-27
•
Expires: 1945-07-14
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Abstract

No abstract record available.

Inventors

  • 👤 Cew Judson A De

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 07:47
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; D21H17/63; D21H17/66; D21H17/67; D21H17/675

Claims Analysis

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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) 1928-10-26 1929-04-27 1929-10-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1932-10-26 1933-04-27 1933-10-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1936-10-26 1937-04-27 1937-10-27 $7700.00 Window Closed / Lapsed

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