Description
Class C01C : AMMONIA; CYANOGEN; COMPOUNDS THEREOF
Subclass 1/249: Ammonia; Compounds thereof Sulfates of ammonium (C01C 1/14 takes precedence) Deacidifying the crystals
Class C01C : AMMONIA; CYANOGEN; COMPOUNDS THEREOF
Subclass 1/249: Ammonia; Compounds thereof Sulfates of ammonium (C01C 1/14 takes precedence) Deacidifying the crystals
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