(under subclass 644) Compositions adapted to mark, label, etc., that to which it is added, in such a manner that the radioactive component may be (a) detected over a period of time or through a system, and (b) used as means of performing a measurement, indication, etc., and the marked or labelled composition.
SEE OR SEARCH CLASS
250, Radiant Energy,
253+, for geological testing or irradiation; subclasses 302+ for radiation trace methods; subclass 308 for inspection of solids or liquids by charged radioactive materials; and subclass 432 for parent daughter isotopes.
423, Chemistry of Inorganic Compounds,
230, for analytical and analytical control processes involving measurements of radioactivity or isotope distribution.
424, Drug, Bio-Affecting and Body Treating Compositions,
1.11+, for class defined compositions and methods comprising a radionuclide or intended radionuclide (e.g., in vivo testing).
600, Surgery,
407+, for diagnostic testing involving detection of nuclear radiation.
