Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
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F23B
METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
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90/00
Combustion methods not related to a particular type of apparatus
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F23B90/04
including secondary combustion
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F23B90/06
the primary combustion being a gasification or pyrolysis in a reductive atmosphere
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