US PATENT SUBCLASS 250 / 303
.~ Radioactive tracer methods
Current as of:
June, 1999
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250 /
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RADIANT ENERGY
302
DF
RADIATION TRACER METHODS
{1}
303
.~ Radioactive tracer methods
DEFINITION
Classification: 250/303
(under subclass 302) Subject matter wherein the material is or includes a radioactive substance.
SEE OR SEARCH THIS CLASS, SUBCLASS:
260, for radioactive tracer methods used in wells.
493.1, for radioactive tracers not found elsewhere.
SEE OR SEARCH CLASS
252, Compositions, 625+, especially 646 for radioactive compositions
424, Drug, Bio-Affecting and Body Treating Compositions,
1.11+, for the class defined compositions and methods comprising a radionuclide or intended radionuclide.
