H01G CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
Introduced: September 1968
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
Description
H01G encompasses electrolytic capacitors and related electrolytic devices designed for energy storage and signal processing applications. The class covers capacitor construction, materials, and designs including aluminum, tantalum, and other electrolytic systems, as well as electrolytic rectifiers, detectors, and switching devices that rely on electrolytic phenomena. It also includes light-sensitive and temperature-sensitive devices utilizing electrolytic principles for sensing applications. Related non-electrolytic capacitors, conventional rectifier diodes, and discrete transistor switching devices are classified elsewhere in the H01 section.
Filing statistics
IPC subclass H01G recorded 104,471 patent applications worldwide between 2013 and 2023. Annual filings grew from 8,098 in 2013 to 9,684 in 2023 (+20%), peaking at 10,482 applications in 2020. 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
In class comparison
H01G ranks 9th of 14 subclasses with filings in H01, with 104,471 applications between 2013 and 2023, 2.6% of the class. Annual filings grew 20% from 2013 to 2023, below the class as a whole (+58%).
| Rank | Subclass | Title | Applications | Share |
|---|---|---|---|---|
| 1 | H01L | 1,327,660 | 33.2% | |
| 2 | H01M, Processes or Means, e.g. Batteries, for the Direct Conversion of Chemical Energy Into Electrical Energy | Processes or Means, e.g. Batteries, for the Direct Conversion of Chemical Energy Into Electrical Energy | 862,000 | 21.5% |
| 3 | H01R, Electrically-Conductive Connections; Structural Associations of a Plurality of Mutually-Insulated Electrical Connecting Elements; Coupling Devices; Current Collectors | Electrically-Conductive Connections; Structural Associations of a Plurality of Mutually-Insulated Electrical Connecting Elements; Coupling Devices; Current Collectors | 480,976 | 12.0% |
| 4 | H01B, Cables; Conductors; Insulators; Selection of Materials for Their Conductive, Insulating or Dielectric Properties | Cables; Conductors; Insulators; Selection of Materials for Their Conductive, Insulating or Dielectric Properties | 250,733 | 6.3% |
| 5 | H01F, Magnets; Inductances; Transformers; Selection of Materials for Their Magnetic Properties | Magnets; Inductances; Transformers; Selection of Materials for Their Magnetic Properties | 244,753 | 6.1% |
| 6 | H01H, Electric Switches; Relays; Selectors; Emergency Protective Devices | Electric Switches; Relays; Selectors; Emergency Protective Devices | 242,774 | 6.1% |
| 7 | H01Q, Antennas, i.e. Radio Aerials | Antennas, i.e. Radio Aerials | 196,719 | 4.9% |
| 8 | H01J, Electric Discharge Tubes or Discharge Lamps | Electric Discharge Tubes or Discharge Lamps | 110,789 | 2.8% |
| 9 | H01G | Capacitors; Capacitors, Rectifiers, Detectors, Switching Devices, Light-Sensitive or Temperature-Sensitive Devices of the Electrolytic Type | 104,471 | 2.6% |
| 10 | H01S, Devices Using the Process of Light Amplification by Stimulated Emission of Radiation [LASER] to Amplify or Generate Light; Devices Using Stimulated Emission of Electromagnetic Radiation in Wave Ranges Other Than Optical | Devices Using the Process of Light Amplification by Stimulated Emission of Radiation [LASER] to Amplify or Generate Light; Devices Using Stimulated Emission of Electromagnetic Radiation in Wave Ranges Other Than Optical | 85,133 | 2.1% |
Source: EPO PATSTAT, worldwide filings
Additional Content
Limiting references
Selection of specified materials as dielectric Capacitors having potential barriers ,
Application references
Indicating or measuring liquid level, or level of fluent solid material by measuring variations of capacity of capacitors Measuring temperature using capacitive elements Impedance networks utilising capacitors Printed circuits incorporating printed capacitors Capacitors as a component of an integrated circuit, e.g. stacked capacitors in DRAMs ,
Related Keywords
9 direct subcodes
Child Classifications
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- H01G 11/00 Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G 13/00 Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups
- H01G 15/00 Structural combinations of capacitors or other devices covered by at least two different main groups of this subclass with each other
- H01G 17/00 Structural combinations of capacitors or other devices covered by at least two different main groups of this subclass with other electric elements, not covered by this subclass, e.g. RC combinations
- H01G 2/00 Details of capacitors not covered by a single one of groups
- H01G 4/00 Fixed capacitors; Processes of their manufacture
- H01G 5/00 Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
- H01G 7/00 Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G 9/00 Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
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