using two or more serially arranged devices

Full Title

Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation > Apparatus therefor > using two or more serially arranged devices

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

FERTILISERS; MANUFACTURE THEREOF

Subclass:

ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES , , e.g. FERTILISERS FROM WASTE OR REFUSE