H01J 13/02 Details
Introduced: September 1968
Last revised: January 2006
Full Title
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Details
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Filing statistics
IPC H01J 13/02 belongs to the parent subclass H01J, which recorded 110,789 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,068 in 2013 to 10,705 in 2023 (+18%), peaking at 11,872 applications in 2021. The most active applicants in class H01 are TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (43,574 applications), SAMSUNG ELECTRONICS COMPANY (42,206 applications) and LG CHEM (21,383 applications).
Source: EPO PATSTAT, worldwide filings
11 direct subcodes
Child Classifications
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- H01J 13/04 Main electrodes; Auxiliary anodes
- H01J 13/2 Control electrodes, e.g. grid
- H01J 13/22 Screens, e.g. for preventing or eliminating arcing-back
- H01J 13/24 Vessels; Containers
- H01J 13/26 Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J 13/28 Selection of substances for gas filling; Means for obtaining or maintaining the desired pressure within the tube
- H01J 13/32 Cooling arrangements; Heating arrangements
- H01J 13/34 Igniting arrangements
- H01J 13/44 Devices for preventing or eliminating arcing-back
- H01J 13/46 One or more circuit elements structurally associated with the tube
- H01J 13/48 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Top Applicants
Top 10 applicants by patent filingsfor 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