Patent classifications
C
CHEMISTRY; METALLURGY
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C22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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C22C
ALLOYS
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C22C1/08
Alloys with open or closed pores
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C22C1/083
Foaming process in molten metal other than by powder metallurgy
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