(under the class definition) Subject matter which includes methods of applying a material onto a surface, into a substance, into a closed or open pipe, or into a fluid, static or moving, and detecting the radiation emitted naturally or as secondary radiation as a result of irradiation of the material or a modification of radiation caused by the material for any purpose not provided for else where.
(1) Note. Subject matter of this subclass includes flow testing methods using fluorescent material and a radiation source to cause the material to give off light.
(2) Note. The combination of a tracer with a manufacturing or an art process will go with the manufacturing or art process; also, articles of manufacture with a tracer for this class will be found with the manufactured item.
SEE OR SEARCH THIS CLASS, SUBCLASS:
259+, for tracer methods used in or about a well.
459.1, for methods involving the irradiation of luminophors.
483.1, for luminescent devices generally.
SEE OR SEARCH CLASS
73, Measuring and Testing,
104+, for surface or cutting edge testing methods and apparatus; and subclass 861.07 for volume or rate of flow meters measuring tracer concentration.
252, Compositions,
301.16, 301.6 for luminescent compositions and subclass 408 for testing or indicating compositions.
324, Electricity: Measuring and Testing,
216, 451, and 452+, respectively, for the combination using electrostatically and magnetically charged particles for detecting for flaws with or without a fluorescent or radioactive tracer.
356, Optics: Measuring and Testing,
237.1+, 426+, and 430+ for flaw testing by optical or visual methods or apparatus.
424, Drug, Bio-Affecting and Body Treating Compositions,
9.1+, for in vivo diagnosis and testing compositions with subclasses 9.6 and 9.61 containing compositions producing in vivo fluorescence and subclasses 9.7, 9.71, 9.8, and 9.81 containing compositions which produce a visible change in the mouth or on the skin and subclasses 10.1+ for Class 424 compositions with an identification or warning feature which may involve color or a color change. 600, Surgery,
1+, for radioactive materials applied to the body for therapy, as well as devices for holding or applying radioactive materials, and subclasses 407+ for imaging of a part or the entire human body.
