(under subclass 210) Processes in which the component removed is in the solid-state in the gaseous mixture.
(1) Note. The solid component is usually particulate in form and may be foreign matter (e.g., dust), or a chemical element or compound.
(2) Note. The usual method of removing a solid component from a gas stream is by physical means, e.g., filtering, washing, deflecting, electrostatic precipitating, etc. However, a chemical reaction is required with the solid component for placement of a patent in this Class 423; see search note following for separating a gaseous mixture by physical means only.
SEE OR SEARCH CLASS
95, Gas Separation: Processes, appropriate subclasses, for separating a gas mixture by mere physical means, e.g., filtering, deflecting, electrostatic precipitating, washing with liquid, etc. where no chemical reaction is involved.
