Patent classifications
A
HUMAN NECESSITIES
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A62
LIFE-SAVING; FIRE-FIGHTING
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A62D
CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
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2203/00
Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
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A62D2203/02
Combined processes involving two or more distinct steps covered by groups A62D3/10 - A62D3/40
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