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Search tools Text Classification Chemistry Measure Numbers Full documents Title Abstract Claims All Any Exact Not Add AND condition These CPCs and their children These exact CPCs Add AND condition
Exact Exact Batch Similar Substructure Substructure (SMARTS) Full documents Claims only Add AND condition
Add AND condition
Application Numbers Publication Numbers Either Add AND condition

Classifications

C02F3/16 Activated sludge processes using surface aeration the aerator having a vertical axis
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CS167343B2

Czechoslovakia

Other languages
Czech

Worldwide applications
1971 CH DE AT 1972 HU SU FR YU SE CS RO PL NO FI JP BE CA GB US BG DD DK NL

Application CS88272A events
1972-02-11
Application filed