US PATENT SUBCLASS 252 / 644
.~ As a source of radiation or heat

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

625  DF  RADIOACTIVE COMPOSITIONS {4}
644.~ As a source of radiation or heat {1}
645  DF  .~.~> For tracing, tagging, or testing

DEFINITION

Classification: 252/644

As a source of radiation or heat:

(under subclass 625) Compositions undre ... which are used as a source of alpha, beta, or gamma rays, and neutron or electron beams, all of which may be used for the heat generated by the same.

SEE OR SEARCH CLASS

250, Radiant Energy,

492+, for radiation sources with definite claimed structure, and see the search notes thereunder.