Top IPC subclasses
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1
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C01B
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2
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non-metallic elementscompounds thereof
|
|
2
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C23F
|
2
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non-mechanical removal of metallic material from surfacesinhibiting corrosion of metallic materialin
|
|
3
|
C25D
|
2
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processes for the electrolytic or electrophoretic production of coatingselectroformingjoining workpi
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4
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C30B
|
2
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single-crystal growthunidirectional solidification of eutectic material or unidirectional demixing o
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5
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C02F
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1
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Treatment of water, waste water, sewage, or sludge
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6
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C23G
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1
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cleaning or de-greasing of metallic material by chemical methods other than electrolysis
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7
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C25B
|
1
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Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
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