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US2423540A Expired / Lapsed US ⏱️ 0.0 years remaining

Self-balancing potentiometer mechanism

Assignee: Brown Instruments Co
•
Filing: 1941-12-01
•
Granted: 1947-07-08
•
Expires: 1961-12-01
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Walter P Wills

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 23:50
CPC Classifications
G; G01; G01R; G01R13/00; F; F24; F24H; F24H9/00; F24H9/20; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/16

Claims Analysis

Total Claims: 0
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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) 1950-07-07 1951-01-06 1951-07-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1954-07-07 1955-01-06 1955-07-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1958-07-07 1959-01-06 1959-07-08 $7700.00 Window Closed / Lapsed

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