Full Title

Window sashes, door leaves, or like elements for closing openings; Layout of fixed or moving closures, e.g. windows ; Features of rigidly-mounted outer frames relating to the mounting of wing frames (E06B5/00 takes precedence; shutters or the like E06B9/00; glass panes C03) > Units comprising two or more parallel glass or like panes permanently secured together > Evacuating or filling the gap between the panes ; Preventing condensation in the gap between the panes (by means of spacing elements E06B3/663); Cleaning the gap between the panes