.~ Inhaled gas heated or humidified by exhaled gas
DEFINITION
Classification: 128/201.13
Inhaled gas heated or humidified by exhaled gas:
(under subclass 200.24) Subject matter wherein the inhaled gas is heated or humidified by exhaled gas.
(1) Note. This subclass includes, inter alia, devices including merely a filter means functioning as a heat exchanger or humidifier by trapping warm water vapor present in the exhaled gas and subsequently transferring the heat and water vapor to gas inhaled through the filter. Similar filter means are placed elsewhere under subclass 200.24 where no heat exchange or humidifying feature is disclosed (see especially subclasses 205.27+).
