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US2826173A Expired / Lapsed US ⏱️ 0.0 years remaining

Lead change pencil

Assignee: ADOLF WALDMAUN
•
Filing: 1954-11-19
•
Granted: 1958-03-11
•
Expires: 1974-11-19
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Abstract

No abstract record available.

Inventors

  • 👤 Gossweiler Oskar
  • 👤 Gossweiler Manfred

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 23:32
CPC Classifications
B; B43; B43K; B43K24/00; B43K24/10; B43K24/14; B43K24/146

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US2176124A Cited
DE682179C Cited
DE699593C Cited
BE509871A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1961-03-10 1961-09-09 1962-03-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1965-03-10 1965-09-09 1966-03-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1969-03-10 1969-09-09 1970-03-11 $7700.00 Window Closed / Lapsed

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