CPC Definition - Subclass G21J
This place covers:
Explosives generated by uncontrolled nuclear reactions, e.g. nuclear fission and fusion bombs, and applications thereof.
Attention is drawn to the following places, which may be of interest for search:
Explosive chemical composition | |
Methods for stimulating production of oil, gas, water, soluble or meltable materials or a slurry of minerals from wells by use of explosives | |
Conventional explosive devices | |
So-called "dirty bombs" where conventional explosives are used to dispense radioactive substances | |
Individual measuring devices may be classified as the measuring device per se | |
Analogue computers for simulating nuclear explosions | |
Nuclear fusion reactors (i.e. controlled nuclear fusion) | |
Nuclear fission reactors (i.e. controlled nuclear fission) | |
Nuclear power plant |
Classification of both important (invention) information and additional information is obligatory.
In this place, the following terms or expressions are used with the meaning indicated:
Uncontrollable reaction | Any fission or fusion reaction where event initiators (e.g. neutrons in the fission process) are produced in a number greater than required to sustain a chain reaction and where there is no mechanism to selectively moderate the reaction, e.g. a fission reactor where the operator has simply opted not to moderate or has failed to moderate the reaction is not a nuclear explosive device in the context of this subclass |
In patent documents, the following words/expressions are often used as synonyms:
- "device" and "bomb"
- "thermonuclear bomb", "hydrogen bomb", "H-bomb" and "fusion bomb"
- "A-bomb", "atom bomb" and "fission bomb"
This place does not cover:
Obtaining oil, gas, water, soluble or meltable material from deep wells by means of nuclear energy |
This group is intended to cover future, yet unknown, inventions that fall under the definition of the group title. Examples for illustrative purposes include excavation processes through nuclear explosions, and systems for mining geothermal energy utilising the detonation of a deeply buried nuclear device to produce a chimney cavity and fractures in a rocky geothermal stratum.