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US2134950A Expired / Lapsed US ⏱️ 0.0 years remaining

Graphitized carbon black

Assignee: Godfrey L Cabot Inc
•
Filing: 1934-08-20
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Granted: 1938-11-01
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Expires: 1954-08-20
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Abstract

No abstract record available.

Inventors

  • 👤 Harold H Offutt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 22:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60; C01; C01P; C01P2006/00; C01P2006/10

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) 1941-10-31 1942-05-02 1942-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1945-10-31 1946-05-02 1946-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1949-10-31 1950-05-02 1950-11-01 $7700.00 Window Closed / Lapsed

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