IPC Main Group
G21H 1/00 Arrangements for obtaining electrical energy from radioactive sources, e.g. from radioactive isotopes
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- Subclass:
- OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION
Related Keywords
CELLS for obtaining electrical energy from radioactive sources
6 direct subcodes
Child Classifications
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- G21H 1/02 Cells charged directly by beta radiation
- G21H 1/04 Cells using secondary emission induced by alpha radiation, beta radiation, or gamma radiation
- G21H 1/06 Cells wherein radiation is applied to the junction of different semiconductor materials
- G21H 1/08 Cells in which radiation ionises a gas in the presence of a junction of two dissimilar metals, i.e. contact potential-difference cells
- G21H 1/1 Cells in which radiation heats a thermoelectric junction or a thermionic converter
- G21H 1/12 Cells using conversion of the radiation into light combined with subsequent photoelectric conversion into electric energy
Top Applicants
Top 10 applicants by patent filingsfor class G21, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA GENERAL NUCLEAR POWER CORPORATION 2,364
- CGN POWER COMPANY 1,899
- CHINA NUCLEAR POWER ENGINEERING COMPANY 1,870
- NUCLEAR POWER INSTITUTE OF CHINA 1,517
- KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,367
- WESTINGHOUSE ELECTRIC CORPORATION US 1,295
- KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,196
- CHINESE ACADEMY OF SCIENCES 1,044
- CHINA INSTITUTE OF ATOMIC ENERGY 1,011
- HITACHI-GE NUCLEAR ENERGY 955