(under subclass 650) Subject matter which includes a screen so water flowing out of the opening must pass through the screen to prevent particles in the water larger than the screen openings from passing therethrough.
SEE OR SEARCH CLASS
210, Liquid Purification or Separation,
348+, for filters which include screens, particularly subclass 455 for receptacle and modified spacing surface or
support for filter medium, and subclasses 464+ for portable receptacle-draining type.
