US PATENT SUBCLASS 454 / 156
.~.~ With air treatment means
Current as of:
June, 1999
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454 /
HD
VENTILATION
69
DF
VEHICLE (E.G., AUTOMOBILE, ETC.)
{15}
143
DF
.~ Having inlet airway {7}
156
.~.~ With air treatment means {3}
157
DF
.~.~.~
> Liquid contact
158
DF
.~.~.~
> Porous filter
159
DF
.~.~.~
> Heating {2}
DEFINITION
Classification: 454/156
With air treatment means:
(under subclass 143) Subject matter comprising means to change a naturally occurring state of the air.
(1) Note. A device which removes dust or grit from inlet air is included in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
201+, for window ventilation having means for lowering the temperature of the air combined with filtering means.
207, for a filtering means combined with window ventilation.
SEE OR SEARCH CLASS
96, Gas Separation: Apparatus, appropriate subclasses for means for removing dust and other contaminants from air, per se.
