Comprising compartments keeping the materials to be mixed separated until the mixing

Official title: {comprising compartments keeping the materials to be mixed separated until the mixing is initiated (containers or packages for packaging two or more different materials which must be maintained separate prior to use in admixture B65D81/32)}

B01F35/522 (Comprising compartments keeping the materials to be mixed separated until the mixing) appears on 153 US grants and 188 published applications in this corpus.