(under subclass 268) Means and methods wherein stationary sifters are employed to sift material suspended in liquid or are associated with liquid-supply means which promote the sifting action.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12.1, 13, 14, 42, and 44, for combinations of sifting with fluid suspension or stratifying separations.
454, through 457, for stratifiers employing stationary permeable beds.
