4. Stock material or miscellaneous articles
  5. All metal or with adjacent metals
  6. Workpiece with longitudinal passageway or stopweld material

William E. Sikkenga

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Investment casting using core with integral wall thickness contr

Stock material or miscellaneous articles – All metal or with adjacent metals – Workpiece with longitudinal passageway or stopweld material
Patent

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Multi-wall core and process

Metal founding – Process – Shaping a forming surface
Reexamination Certificate

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Multipiece core assembly

Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate

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Multipiece core assembly for cast airfoil

Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate

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Profile ID: LFUS-PAI-P-663044

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