FI (Note)/(Index) list

Descriptions for C22B3/00 and notes/indexes are displayed on this screen.

C22B3/00 Extraction of metal compounds from ores or concentrate by wet processes [5]

Note(s)
    When classifying in this group, the nature of any metal which is considered to represent information of interest for search may also be classified in the main groups only of C22B 11/00-C22B 25/00, in group C22B 19/34 or in any of groups C22B 26/00-C22B 61/00. This can, for example, be the case when it is considered of interest to enable searching for extraction of specific metals or their compounds. Such non-obligatory classification should be given as "additional information".[1,8]