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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27/00
Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
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C22C27/04
Alloys based on tungsten or molybdenum
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