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STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY (electrostatic machines H02N; uses of electricity in performing operations, e.g. precipitation, see the relevant subclasses for the operations) [2020-05]

  • This subclass covers methods or arrangements for preventing the formation of electrostatic charges on bodies or for carrying-off these charges after their formation.
  • This subclass does not cover specific applications of the above-mentioned methods or arrangements, e.g. during the manufacture of artificial fibres or films, which are covered by the relevant subclasses.

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
H05F 1/00
Preventing the formation of electrostatic charges [2013-01]
H05F 1/02
by surface treatment [2013-01]
H05F 3/00
Carrying-off electrostatic charges ({from shoes A43B 7/36}; from living beings A61N 1/14; {from tyres B60C 19/08; from vehicles B60R 16/06; from aircraft B64D 45/02; from large containers B65D 90/46}) [2013-01]
H05F 3/02
by means of earthing connections [2013-01]
H05F 3/025
. .
{Floors or floor coverings specially adapted for discharging static charges} [2013-01]
H05F 3/04
by means of spark gaps or other discharge devices (devices providing for corona discharge per se H01T 19/00) [2013-01]
H05F 3/06
by means of ionising radiation [2013-01]
H05F 7/00
Use of naturally-occurring electricity, {e.g. lightning or static electricity} [2017-05]