Patent classifications
C
CHEMISTRY; METALLURGY
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C03
GLASS; MINERAL OR SLAG WOOL
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C03B
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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C03B2215/02
Press-mould materials
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C03B2215/08
Coated press-mould dies
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C03B2215/30
Intermediate layers, e.g. graded zone of base/top material
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C03B2215/31
Two or more distinct intermediate layers or zones
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