US PATENT SUBCLASS 250 / 423 P
.~ Photoionization type
Current as of: June, 1999
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Unofficial Alpha Subclasses: R P F
DEFINITION
Classification: 250/423
(under the class definition) Subject matter comprising electrical means or processes to remove from or add to an electrically neutral atom or molecule one or more electrons to give to the atom or molecule a net electrical charge.
(1) Note. Subject matter in this subclass and the subclasses indented hereunder includes ion beam generators wherein the ion generator is combined with means to accelerate the ions in one general direction. Such means to accelerate typically includes accelerating electric field means or means to form the material to be ionized into a vapor jet so that the vapor particles after ionization, will be in beam form by virtue of their momentum.
(2) Note. This subclass is the residual locus for ion generators, per se, not elsewhere classified.
SEE OR SEARCH THIS CLASS, SUBCLASS:
396, for ion generators with beam deflecting or focussing means.
SEE OR SEARCH CLASS 60, Power Plants,
202, for ion motors.
313, Electric Lamp and Discharge Devices,
62, for ion generators in Cyclotrons and subclasses 359.1+ for discharge devices with means to generate and accelerate positive or negative ions, and subclasses 231.01+ for means for supplying gas to the discharge space.
315, Electric Lamp and Discharge Devices: Systems,
111.01+, for means for supplying fluent material to a discharge device where the fluent material may be ionized to produce ions.
361, Electricity: Electrical Systems and Devices,
230+, for ion generators generally operated in the ambient atmosphere.
