4. Compositions: coating or plastic
  5. Coating or plastic compositions
  6. Bituminous material or tarry residue

Koppers Delaware, Inc.

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Coal tar and hydrocarbon mixture pitch and the preparation...

Mineral oils: processes and products – Asphalts – tars – pitches and resins; making – treating and... – By distillation
Reexamination Certificate

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Coal tar and hydrocarbon mixture pitch and the preparation...

Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Reexamination Certificate

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Notched tie plate insulator

Railways: surface track – Rail seats – Cushions
Reexamination Certificate

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