SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)

Introduced: September 1968

Description

H01T encompasses electrical devices that generate controlled or protective electrical discharges in gases, including spark gaps for switching and overvoltage protection, ignition spark plugs for internal combustion engines, and corona discharge devices for ionization. This classification covers the design, construction, and operational principles of discharge electrodes, gap geometries, insulating materials, and triggering mechanisms used in these applications. It excludes gas discharge tubes with enclosed electrodes (covered by H01J) and arc discharge devices intended primarily for welding or cutting (covered by B23K). Typical technologies include automotive ignition systems, electrical surge protection devices, and industrial ionization equipment.

Title

Titles differ between systems:

IPC: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES

CPC: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)

Full Title

Full titles differ between systems:

IPC:

SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES

CPC:

SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)

Additional Content IPC

Glossary

Spark gap spark gaps Enclosed or non-enclosed discharge device having cold electrodes and used exclusively to discharge a quantity of electrical energy in a small time duration

Application references

Overvoltage protection circuits using a spark gap Emergency protective circuit arrangements using spark gaps ,

IPC and CPC are identically structured here. All 12 subcodes exist in both systems.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

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H01T 1/00 Details of spark gaps IPC+CPC Available in IPC and CPC
H01T 11/00 Spark gaps specially adapted as rectifiers IPC+CPC Available in IPC and CPC
H01T 13/00 Sparking plugs IPC+CPC Available in IPC and CPC
H01T 14/00 Spark gaps not provided for in groups H01T2/00 - H01T13/00 (devices providing for corona discharge H01T19/00) since 1985 IPC+CPC Available in IPC and CPC
H01T 15/00 Circuits specially adapted for spark gaps, e.g. ignition circuits (ignition circuits for internal-combustion engines F02P; electric spark ignition for combustion apparatus F23Q; protection circuits using spark gaps H02H9/06) IPC+CPC Available in IPC and CPC
H01T 19/00 Devices providing for corona discharge (for charging electrographic elements G03G15/02) IPC+CPC Available in IPC and CPC
H01T 2/00 Spark gaps comprising auxiliary triggering means (triggering circuits H01T15/00) since 1985 IPC+CPC Available in IPC and CPC
H01T 21/00 Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs IPC+CPC Available in IPC and CPC
H01T 23/00 Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere since 1985 IPC+CPC Available in IPC and CPC
H01T 4/00 Overvoltage arresters using spark gaps (H01T2/00 takes precedence; overvoltage protection circuits using spark gaps H02H9/06) since 1985 IPC+CPC Available in IPC and CPC
H01T 7/00 Rotary spark gaps, i.e. devices having one or more rotating electrodes IPC+CPC Available in IPC and CPC
H01T 9/00 Spark gaps specially adapted for generating oscillations IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
SAMSUNG ELECTRONICS COMPANY KR 42,206
LG CHEM KR 21,383
APPLIED MATERIALS US 20,441
LG ENERGY SOLUTION KR 20,279
SAMSUNG DISPLAY KR 19,725
CHINESE ACADEMY OF SCIENCES 19,400
TOYOTA MOTOR CORPORATION 18,819
SGCC(STATE GRID CORPORATION OF CHINA) 18,082
TOKYO ELECTRON JP 17,634

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

SAMSUNG ELECTRONICS COMPANY KR 37,897
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
APPLIED MATERIALS US 21,640
LG ENERGY SOLUTION KR 20,770
LG CHEM KR 19,835
TOKYO ELECTRON JP 18,519
ROBERT BOSCH DE 14,595
INTEL CORPORATION US 13,580
MURATA MANUFACTURING COMPANY JP 12,151
SAMSUNG SDI COMPANY KR 12,080