A separator for separating solid particles from a vapor-gas mixture includes a dust chamber with a main body having an inlet for a vapor-gas mixture containing semi-coke particles and an outlet chute in a bottom of the main body for removal of semi-coke particles. Several embodiments of a laryngeal electromyography tube include a conductive electrode surface that is painted, screen printed or otherwise applied directly onto the body of an endotracheal tube, such that the final device has no raised surfaces which can injure the vocal cords. The one or more store instructions are initiated within an active transaction and include store data. The compositions may be used on any nonporous surface or substrate including metals, ceramics and plastics, without harming the surface or substrate. The first hard mask film protects the interlevel dielectric film during removal of the second and third hard mask films.