Patents

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

C01B25/46 Preparation involving solvent-solvent extraction
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CS150619B2

Czechoslovakia


Worldwide applications
1967 FR 1968 YU GB BE HU IL NL JP CS 1971 US

Application CS8170A events
1968-11-29
Application filed